diff --git a/Cargo.lock b/Cargo.lock
index 29eaae8..44483f5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -420,10 +420,23 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-casm"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
 dependencies = [
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-utils 2.8.5",
+ "indoc",
+ "num-bigint",
+ "num-traits 0.2.19",
+ "parity-scale-codec",
+ "serde",
+]
+
+[[package]]
+name = "cairo-lang-casm"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
+dependencies = [
+ "cairo-lang-utils 2.9.1",
  "indoc",
  "num-bigint",
  "num-traits 0.2.19",
@@ -451,10 +464,19 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-eq-solver"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
+dependencies = [
+ "cairo-lang-utils 2.8.5",
+ "good_lp",
+]
+
+[[package]]
+name = "cairo-lang-eq-solver"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
 dependencies = [
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-utils 2.9.1",
  "good_lp",
 ]
 
@@ -512,11 +534,37 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-sierra"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
 dependencies = [
  "anyhow",
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-utils 2.8.5",
+ "const-fnv1a-hash",
+ "convert_case",
+ "derivative",
+ "itertools 0.12.1",
+ "lalrpop",
+ "lalrpop-util",
+ "num-bigint",
+ "num-integer",
+ "num-traits 0.2.19",
+ "regex",
+ "rust-analyzer-salsa",
+ "serde",
+ "serde_json",
+ "sha3",
+ "smol_str",
+ "starknet-types-core",
+ "thiserror",
+]
+
+[[package]]
+name = "cairo-lang-sierra"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
+dependencies = [
+ "anyhow",
+ "cairo-lang-utils 2.9.1",
  "const-fnv1a-hash",
  "convert_case",
  "derivative",
@@ -567,13 +615,28 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-sierra-ap-change"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
 dependencies = [
- "cairo-lang-eq-solver 2.8.2",
- "cairo-lang-sierra 2.8.2",
- "cairo-lang-sierra-type-size 2.8.2",
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-eq-solver 2.8.5",
+ "cairo-lang-sierra 2.8.5",
+ "cairo-lang-sierra-type-size 2.8.5",
+ "cairo-lang-utils 2.8.5",
+ "itertools 0.12.1",
+ "num-bigint",
+ "num-traits 0.2.19",
+ "thiserror",
+]
+
+[[package]]
+name = "cairo-lang-sierra-ap-change"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
+dependencies = [
+ "cairo-lang-eq-solver 2.9.1",
+ "cairo-lang-sierra 2.9.1",
+ "cairo-lang-sierra-type-size 2.9.1",
+ "cairo-lang-utils 2.9.1",
  "itertools 0.12.1",
  "num-bigint",
  "num-traits 0.2.19",
@@ -611,13 +674,28 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-sierra-gas"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
+dependencies = [
+ "cairo-lang-eq-solver 2.8.5",
+ "cairo-lang-sierra 2.8.5",
+ "cairo-lang-sierra-type-size 2.8.5",
+ "cairo-lang-utils 2.8.5",
+ "itertools 0.12.1",
+ "num-bigint",
+ "num-traits 0.2.19",
+ "thiserror",
+]
+
+[[package]]
+name = "cairo-lang-sierra-gas"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
 dependencies = [
- "cairo-lang-eq-solver 2.8.2",
- "cairo-lang-sierra 2.8.2",
- "cairo-lang-sierra-type-size 2.8.2",
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-eq-solver 2.9.1",
+ "cairo-lang-sierra 2.9.1",
+ "cairo-lang-sierra-type-size 2.9.1",
+ "cairo-lang-utils 2.9.1",
  "itertools 0.12.1",
  "num-bigint",
  "num-traits 0.2.19",
@@ -666,16 +744,36 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-sierra-to-casm"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
+dependencies = [
+ "assert_matches",
+ "cairo-lang-casm 2.8.5",
+ "cairo-lang-sierra 2.8.5",
+ "cairo-lang-sierra-ap-change 2.8.5",
+ "cairo-lang-sierra-gas 2.8.5",
+ "cairo-lang-sierra-type-size 2.8.5",
+ "cairo-lang-utils 2.8.5",
+ "indoc",
+ "itertools 0.12.1",
+ "num-bigint",
+ "num-traits 0.2.19",
+ "starknet-types-core",
+ "thiserror",
+]
+
+[[package]]
+name = "cairo-lang-sierra-to-casm"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
 dependencies = [
  "assert_matches",
- "cairo-lang-casm 2.8.2",
- "cairo-lang-sierra 2.8.2",
- "cairo-lang-sierra-ap-change 2.8.2",
- "cairo-lang-sierra-gas 2.8.2",
- "cairo-lang-sierra-type-size 2.8.2",
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-casm 2.9.1",
+ "cairo-lang-sierra 2.9.1",
+ "cairo-lang-sierra-ap-change 2.9.1",
+ "cairo-lang-sierra-gas 2.9.1",
+ "cairo-lang-sierra-type-size 2.9.1",
+ "cairo-lang-utils 2.9.1",
  "indoc",
  "itertools 0.12.1",
  "num-bigint",
@@ -704,11 +802,20 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-sierra-type-size"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
 dependencies = [
- "cairo-lang-sierra 2.8.2",
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-sierra 2.8.5",
+ "cairo-lang-utils 2.8.5",
+]
+
+[[package]]
+name = "cairo-lang-sierra-type-size"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
+dependencies = [
+ "cairo-lang-sierra 2.9.1",
+ "cairo-lang-utils 2.9.1",
 ]
 
 [[package]]
@@ -760,13 +867,35 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-starknet-classes"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
 dependencies = [
- "cairo-lang-casm 2.8.2",
- "cairo-lang-sierra 2.8.2",
- "cairo-lang-sierra-to-casm 2.8.2",
- "cairo-lang-utils 2.8.2",
+ "cairo-lang-casm 2.8.5",
+ "cairo-lang-sierra 2.8.5",
+ "cairo-lang-sierra-to-casm 2.8.5",
+ "cairo-lang-utils 2.8.5",
+ "convert_case",
+ "itertools 0.12.1",
+ "num-bigint",
+ "num-integer",
+ "num-traits 0.2.19",
+ "serde",
+ "serde_json",
+ "sha3",
+ "smol_str",
+ "starknet-types-core",
+ "thiserror",
+]
+
+[[package]]
+name = "cairo-lang-starknet-classes"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
+dependencies = [
+ "cairo-lang-casm 2.9.1",
+ "cairo-lang-sierra 2.9.1",
+ "cairo-lang-sierra-to-casm 2.9.1",
+ "cairo-lang-utils 2.9.1",
  "convert_case",
  "itertools 0.12.1",
  "num-bigint",
@@ -810,8 +939,22 @@ dependencies = [
 
 [[package]]
 name = "cairo-lang-utils"
-version = "2.8.2"
-source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.2#14b1d8c1566b3346545eb7e65724e3d0cbb80a81"
+version = "2.8.5"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.8.5#aac3a51aa78e8f7d06bbb2aa659fb1767b8bc203"
+dependencies = [
+ "hashbrown 0.14.5",
+ "indexmap 2.3.0",
+ "itertools 0.12.1",
+ "num-bigint",
+ "num-traits 0.2.19",
+ "schemars",
+ "serde",
+]
+
+[[package]]
+name = "cairo-lang-utils"
+version = "2.9.1"
+source = "git+https://github.com/starkware-libs/cairo?tag=v2.9.1#3b1043862555f5a6ebd0e08d5a318d72890d1f35"
 dependencies = [
  "hashbrown 0.14.5",
  "indexmap 2.3.0",
@@ -3310,7 +3453,8 @@ dependencies = [
  "bigdecimal",
  "cairo-lang-starknet-classes 2.6.4",
  "cairo-lang-starknet-classes 2.7.1",
- "cairo-lang-starknet-classes 2.8.2",
+ "cairo-lang-starknet-classes 2.8.5",
+ "cairo-lang-starknet-classes 2.9.1",
  "chrono",
  "clap",
  "clap_complete",
diff --git a/Cargo.toml b/Cargo.toml
index b21d096..224534d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,8 @@ auto_impl = "1.1.0"
 bigdecimal = "0.4.1"
 cairo-starknet-2-6-4 = { package = "cairo-lang-starknet-classes", git = "https://github.com/starkware-libs/cairo", tag = "v2.6.4" }
 cairo-starknet-2-7-1 = { package = "cairo-lang-starknet-classes", git = "https://github.com/starkware-libs/cairo", tag = "v2.7.1" }
-cairo-starknet-2-8-2 = { package = "cairo-lang-starknet-classes", git = "https://github.com/starkware-libs/cairo", tag = "v2.8.2" }
+cairo-starknet-2-8-5 = { package = "cairo-lang-starknet-classes", git = "https://github.com/starkware-libs/cairo", tag = "v2.8.5" }
+cairo-starknet-2-9-1 = { package = "cairo-lang-starknet-classes", git = "https://github.com/starkware-libs/cairo", tag = "v2.9.1" }
 chrono = "0.4.26"
 clap = { version = "4.3.8", features = ["derive", "env", "string"] }
 clap_complete = "4.3.1"
diff --git a/src/casm.rs b/src/casm.rs
index 0b51f92..06da835 100644
--- a/src/casm.rs
+++ b/src/casm.rs
@@ -73,7 +73,7 @@ impl CasmArgs {
                     Some(network) => {
                         let auto_version = match network {
                             Network::Sepolia | Network::SepoliaIntegration | Network::Mainnet => {
-                                CompilerVersion::V2_8_2
+                                CompilerVersion::V2_9_1
                             }
                         };
 
diff --git a/src/compiler.rs b/src/compiler.rs
index b7843d5..41358df 100644
--- a/src/compiler.rs
+++ b/src/compiler.rs
@@ -14,9 +14,13 @@ use cairo_starknet_2_7_1::{
     casm_contract_class::CasmContractClass as Cairo271CasmClass,
     contract_class::ContractClass as Cairo271Class,
 };
-use cairo_starknet_2_8_2::{
-    casm_contract_class::CasmContractClass as Cairo282CasmClass,
-    contract_class::ContractClass as Cairo282Class,
+use cairo_starknet_2_8_5::{
+    casm_contract_class::CasmContractClass as Cairo285CasmClass,
+    contract_class::ContractClass as Cairo285Class,
+};
+use cairo_starknet_2_9_1::{
+    casm_contract_class::CasmContractClass as Cairo291CasmClass,
+    contract_class::ContractClass as Cairo291Class,
 };
 use clap::{builder::PossibleValue, ValueEnum};
 use starknet::core::types::{
@@ -41,7 +45,8 @@ pub struct CompilerBinary {
 pub enum CompilerVersion {
     V2_6_4,
     V2_7_1,
-    V2_8_2,
+    V2_8_5,
+    V2_9_1,
 }
 
 impl BuiltInCompiler {
@@ -75,11 +80,11 @@ impl BuiltInCompiler {
             }
             CompilerVersion::V2_7_1 => {
                 // TODO: directly convert type without going through JSON
-                let contract_class: Cairo282Class = serde_json::from_str(&sierra_class_json)?;
+                let contract_class: Cairo271Class = serde_json::from_str(&sierra_class_json)?;
 
                 // TODO: implement the `validate_compatible_sierra_version` call
 
-                let casm_contract = Cairo282CasmClass::from_contract_class(
+                let casm_contract = Cairo271CasmClass::from_contract_class(
                     contract_class,
                     false,
                     MAX_BYTECODE_SIZE,
@@ -87,13 +92,27 @@ impl BuiltInCompiler {
 
                 serde_json::to_string(&casm_contract)?
             }
-            CompilerVersion::V2_8_2 => {
+            CompilerVersion::V2_8_5 => {
                 // TODO: directly convert type without going through JSON
-                let contract_class: Cairo271Class = serde_json::from_str(&sierra_class_json)?;
+                let contract_class: Cairo285Class = serde_json::from_str(&sierra_class_json)?;
 
                 // TODO: implement the `validate_compatible_sierra_version` call
 
-                let casm_contract = Cairo271CasmClass::from_contract_class(
+                let casm_contract = Cairo285CasmClass::from_contract_class(
+                    contract_class,
+                    false,
+                    MAX_BYTECODE_SIZE,
+                )?;
+
+                serde_json::to_string(&casm_contract)?
+            }
+            CompilerVersion::V2_9_1 => {
+                // TODO: directly convert type without going through JSON
+                let contract_class: Cairo291Class = serde_json::from_str(&sierra_class_json)?;
+
+                // TODO: implement the `validate_compatible_sierra_version` call
+
+                let casm_contract = Cairo291CasmClass::from_contract_class(
                     contract_class,
                     false,
                     MAX_BYTECODE_SIZE,
@@ -161,7 +180,7 @@ impl Default for CompilerVersion {
 
 impl ValueEnum for CompilerVersion {
     fn value_variants<'a>() -> &'a [Self] {
-        &[Self::V2_6_4, Self::V2_7_1, Self::V2_8_2]
+        &[Self::V2_6_4, Self::V2_7_1, Self::V2_8_5, Self::V2_9_1]
     }
 
     fn to_possible_value(&self) -> Option<PossibleValue> {
@@ -178,12 +197,18 @@ impl ValueEnum for CompilerVersion {
                     .alias("2.7")
                     .alias("v2.7"),
             ),
-            Self::V2_8_2 => Some(
-                PossibleValue::new("2.8.2")
-                    .alias("v2.8.2")
+            Self::V2_8_5 => Some(
+                PossibleValue::new("2.8.5")
+                    .alias("v2.8.5")
                     .alias("2.8")
                     .alias("v2.8"),
             ),
+            Self::V2_9_1 => Some(
+                PossibleValue::new("2.9.1")
+                    .alias("v2.9.1")
+                    .alias("2.9")
+                    .alias("v2.9"),
+            ),
         }
     }
 }
@@ -195,7 +220,8 @@ impl FromStr for CompilerVersion {
         match s {
             "2.6.4" | "v2.6.4" | "2.6" | "v2.6" => Ok(Self::V2_6_4),
             "2.7.1" | "v2.7.1" | "2.7" | "v2.7" => Ok(Self::V2_7_1),
-            "2.8.2" | "v2.8.2" | "2.8" | "v2.8" => Ok(Self::V2_8_2),
+            "2.8.5" | "v2.8.5" | "2.8" | "v2.8" => Ok(Self::V2_8_5),
+            "2.9.1" | "v2.9.1" | "2.9" | "v2.9" => Ok(Self::V2_9_1),
             _ => Err(anyhow::anyhow!("unknown version: {}", s)),
         }
     }
@@ -206,7 +232,8 @@ impl Display for CompilerVersion {
         match self {
             CompilerVersion::V2_6_4 => write!(f, "2.6.4"),
             CompilerVersion::V2_7_1 => write!(f, "2.7.1"),
-            CompilerVersion::V2_8_2 => write!(f, "2.8.2"),
+            CompilerVersion::V2_8_5 => write!(f, "2.8.5"),
+            CompilerVersion::V2_9_1 => write!(f, "2.9.1"),
         }
     }
 }