diff --git a/Cargo.lock b/Cargo.lock
index b02c7582..24d181f1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1882,7 +1882,7 @@ dependencies = [
  "http",
  "num-bigint-dig",
  "oid",
- "picky-asn1 0.3.2",
+ "picky-asn1 0.3.3",
  "picky-asn1-der 0.2.5",
  "picky-asn1-x509 0.6.1",
  "pretty_assertions",
@@ -1909,7 +1909,7 @@ dependencies = [
 
 [[package]]
 name = "picky-asn1"
-version = "0.3.2"
+version = "0.3.3"
 dependencies = [
  "chrono",
  "oid",
@@ -1936,7 +1936,7 @@ dependencies = [
  "lazy_static",
  "num-bigint-dig",
  "oid",
- "picky-asn1 0.3.2",
+ "picky-asn1 0.3.3",
  "pretty_assertions",
  "serde",
  "serde_bytes",
@@ -1964,7 +1964,7 @@ dependencies = [
  "hex",
  "num-bigint-dig",
  "oid",
- "picky-asn1 0.3.2",
+ "picky-asn1 0.3.3",
  "picky-asn1-der 0.2.5",
  "pretty_assertions",
  "serde",
@@ -1987,7 +1987,7 @@ dependencies = [
  "multibase",
  "multihash",
  "picky 6.3.0",
- "picky-asn1 0.3.2",
+ "picky-asn1 0.3.3",
  "rand 0.8.3",
  "reqwest 0.11.3",
  "saphir",
diff --git a/ci/azure-pipelines.yaml b/ci/azure-pipelines.yaml
index 6a6cb164..9f256bbe 100644
--- a/ci/azure-pipelines.yaml
+++ b/ci/azure-pipelines.yaml
@@ -88,3 +88,25 @@ jobs:
           pathToPublish: $(Build.ArtifactStagingDirectory)
           artifactName: picky
 
+  - job: msrv
+    # Minimum supported Rust version check for published crates.
+    # If this break, bump crate version minor number.
+    # See https://github.com/Devolutions/picky-rs/issues/89
+
+    pool:
+      vmImage: ubuntu-18.04
+    steps:
+      - script: |
+          set -e
+          curl https://sh.rustup.rs -sSf | sh -s -- -y --profile minimal --default-toolchain 1.43
+          rustup toolchain install 1.49
+        displayName: "Install rust 1.43 and 1.49"
+      - script: cargo +1.43 check -p picky-asn1
+        displayName: cargo check picky-asn1
+      - script: cargo +1.43 check -p picky-asn1-der
+        displayName: cargo check picky-asn1-der
+      - script: cargo +1.43 check -p picky-asn1-x509
+        displayName: cargo check picky-asn1-x509
+      - script: cargo +1.49 check -p picky
+        displayName: cargo check picky
+
diff --git a/picky-asn1-der/README.md b/picky-asn1-der/README.md
index 6126ab1f..f65c54d2 100644
--- a/picky-asn1-der/README.md
+++ b/picky-asn1-der/README.md
@@ -2,6 +2,9 @@
 [![docs.rs](https://docs.rs/picky-asn1-der/badge.svg)](https://docs.rs/picky-asn1-der)
 ![Crates.io](https://img.shields.io/crates/l/picky-asn1-der)
 
+Compatible with rustc 1.43.
+Minimal rustc version bumps happen [only with minor number bumps in this project](https://github.com/Devolutions/picky-rs/issues/89#issuecomment-868303478).
+
 # picky-asn1-der
 
 Portions of project [serde_asn1_der](https://github.com/KizzyCode/serde_asn1_der) are held by
diff --git a/picky-asn1-x509/README.md b/picky-asn1-x509/README.md
index c163eaba..7d6a66cf 100644
--- a/picky-asn1-x509/README.md
+++ b/picky-asn1-x509/README.md
@@ -2,6 +2,9 @@
 [![docs.rs](https://docs.rs/picky-asn1-x509/badge.svg)](https://docs.rs/picky-asn1-x509)
 ![Crates.io](https://img.shields.io/crates/l/picky-asn1-x509)
 
+Compatible with rustc 1.43.
+Minimal rustc version bumps happen [only with minor number bumps in this project](https://github.com/Devolutions/picky-rs/issues/89#issuecomment-868303478).
+
 # picky-asn1-x509
 
 Provide implementation for types defined in [X.509 RFC](https://tools.ietf.org/html/rfc5280) and related RFC ([PKCS#8](https://tools.ietf.org/html/rfc5208), [PKCS#10](https://tools.ietf.org/html/rfc2986)).
@@ -11,3 +14,4 @@ This is a low-level library providing only raw types for serialization and deser
 These types are implementing `serde`'s `Serialize` and `Deserialize` and are to be used with [picky-asn1-der](https://crates.io/crates/picky-asn1-der).
 If you're looking for a higher level API, you may be interested by the [picky crate](https://crates.io/crates/picky) which uses
 this library internally and provides a nicer API.
+
diff --git a/picky-asn1-x509/src/oids.rs b/picky-asn1-x509/src/oids.rs
index 4a51323a..6123a6ce 100644
--- a/picky-asn1-x509/src/oids.rs
+++ b/picky-asn1-x509/src/oids.rs
@@ -13,9 +13,8 @@
 /// I mean, I'm literally creating infinity out of emptiness.
 /// If you don't care about your mental sanity, you can read the
 /// [nomicon on unchecked uninitialized memory](https://doc.rust-lang.org/nomicon/unchecked-uninit.html).
-#[allow(invalid_value)]
 unsafe fn unreachable() -> ! {
-    core::mem::MaybeUninit::uninit().assume_init()
+    std::hint::unreachable_unchecked()
 }
 
 macro_rules! define_oid {
diff --git a/picky-asn1/CHANGELOG.md b/picky-asn1/CHANGELOG.md
index 2062c883..5f30678f 100644
--- a/picky-asn1/CHANGELOG.md
+++ b/picky-asn1/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## [0.3.3] 2021-07-02
+
+### Fixed
+
+- Support for rustc 1.43 (accidently bumped in 0.3.2). See [#89](https://github.com/Devolutions/picky-rs/issues/89).
+
 ## [0.3.2] 2021-05-27
 
 ### Added
diff --git a/picky-asn1/Cargo.toml b/picky-asn1/Cargo.toml
index 8245b120..2bf554d8 100644
--- a/picky-asn1/Cargo.toml
+++ b/picky-asn1/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "picky-asn1"
-version = "0.3.2"
+version = "0.3.3"
 edition = "2018"
 authors = [
     "Benoît CORTIER <benoit.cortier@fried-world.eu>",
diff --git a/picky-asn1/README.md b/picky-asn1/README.md
index 914e41e7..c8c1beb0 100644
--- a/picky-asn1/README.md
+++ b/picky-asn1/README.md
@@ -2,6 +2,9 @@
 [![docs.rs](https://docs.rs/picky-asn1/badge.svg)](https://docs.rs/picky-asn1)
 ![Crates.io](https://img.shields.io/crates/l/picky-asn1)
 
+Compatible with rustc 1.43.
+Minimal rustc version bumps happen [only with minor number bumps in this project](https://github.com/Devolutions/picky-rs/issues/89#issuecomment-868303478).
+
 # picky-asn1
 
 Defines wrappers for ASN.1 types:
diff --git a/picky-asn1/src/restricted_string.rs b/picky-asn1/src/restricted_string.rs
index bc4455f8..d7a7955e 100644
--- a/picky-asn1/src/restricted_string.rs
+++ b/picky-asn1/src/restricted_string.rs
@@ -265,7 +265,7 @@ impl CharSet for BMPCharSet {
             .into_iter()
             .map(|elem| u16::from_be_bytes([elem[1], elem[0]]));
 
-        char::decode_utf16(u16_it).all(|c| matches!(c, Ok(_)))
+        core::char::decode_utf16(u16_it).all(|c| matches!(c, Ok(_)))
     }
 }
 
diff --git a/picky/README.md b/picky/README.md
index 9d80e876..9e3f7aaf 100644
--- a/picky/README.md
+++ b/picky/README.md
@@ -2,6 +2,9 @@
 [![docs.rs](https://docs.rs/picky/badge.svg)](https://docs.rs/picky)
 ![Crates.io](https://img.shields.io/crates/l/picky)
 
+Compatible with rustc 1.49.
+Minimal rustc version bumps happen [only with minor number bumps in this project](https://github.com/Devolutions/picky-rs/issues/89#issuecomment-868303478).
+
 # picky
 
 Portable X.509, PKI, JOSE and HTTP signature implementation.
diff --git a/setup-git-hooks.sh b/setup-git-hooks.sh
index aa335d17..cc9bf1db 100755
--- a/setup-git-hooks.sh
+++ b/setup-git-hooks.sh
@@ -8,11 +8,32 @@ if test -f "$PRE_COMMIT_HOOK"; then
 fi
 
 echo "#!/bin/sh
+git stash -q --keep-index
+
+ret=0
+
 cargo +stable fmt --all -- --check 2> /dev/null
+
 if ! [ \$? -eq 0 ] ; then
+    ret=1
     printf \"\n\$(tput setaf 3)Bad formatting, please run 'cargo +stable fmt' and stage modifications\n\n\"
-    exit 1
-fi" > "$PRE_COMMIT_HOOK"
+fi
+
+cargo clippy -- -D warnings
+
+if ! [ \$? -eq 0 ] ; then
+    ret=1
+    printf \"\n\$(tput setaf 3)Fix clippy lints and stage modifications\n\n\"
+fi
+
+if ! [ \$ret -eq 0 ] ; then
+    printf \"\$(tput setaf 1)Git pre-commit hook failed.\$(tput sgr0)\n\"
+    printf \"Alternatively, \\\`--no-verify\\\` or \\\`-n\\\` option may be used to bypass the pre-commit hook.\n\"
+fi
+
+git stash pop -q
+
+exit \$ret" > "$PRE_COMMIT_HOOK"
 chmod +x "$PRE_COMMIT_HOOK"
 echo "$(tput setaf 2)$PRE_COMMIT_HOOK created"