diff --git a/CHANGES.md b/CHANGES.md
index f492c8b91..5ba366666 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -5,6 +5,7 @@
 * update FastAPI requirements
 * add `validate` in `MosaicTilerFactory` (https://github.com/developmentseed/titiler/pull/206, author @drnextgis)
 * rename `ressources` package to `resources` (https://github.com/developmentseed/titiler/pull/210, author @drnextgis)
+* renamed environment variables prefixes for API and STACK configurations: `TITILER_STACK` as prefix to CDK and `TITILER_API` as prefix to API (https://github.com/developmentseed/titiler/pull/211, author @fredliporace)
 
 ## 0.1.0a14 (2021-01-05)
 
diff --git a/deployment/aws/.env.example b/deployment/aws/.env.example
index c10dd2eb5..724bd3ed5 100644
--- a/deployment/aws/.env.example
+++ b/deployment/aws/.env.example
@@ -1,9 +1,9 @@
-STACK_NAME="my-tiler"
-STACK_STAGE="dev"
-STACK_BUCKETS='["my-bucket*", "*"]'
-STACK_MEMORY=3008
+TITILER_STACK_NAME="my-tiler"
+TITILER_STACK_STAGE="dev"
+TITILER_STACK_BUCKETS='["my-bucket*", "*"]'
+TITILER_STACK_MEMORY=3008
 
 # Uncomment to allow lambda to access content on requester-payer buckets
-# STACK_ADDITIONAL_ENV='{"AWS_REQUEST_PAYER":"requester"}'
+# TITILER_STACK_ADDITIONAL_ENV='{"AWS_REQUEST_PAYER":"requester"}'
 # Uncomment if you only on the /cog endpoint
-# STACK_ADDITIONAL_ENV='{"API_DISABLE_STAC": "TRUE", "API_DISABLE_MOSAIC": "TRUE"}'
+# TITILER_STACK_ADDITIONAL_ENV='{"TITILER_API_DISABLE_STAC": "TRUE", "TITILER_API_DISABLE_MOSAIC": "TRUE"}'
diff --git a/deployment/aws/cdk/config.py b/deployment/aws/cdk/config.py
index f27a46b69..5e37f18de 100644
--- a/deployment/aws/cdk/config.py
+++ b/deployment/aws/cdk/config.py
@@ -1,4 +1,4 @@
-"""STACK Configs."""
+"""TITILER_STACK Configs."""
 
 from typing import Dict, List, Optional
 
@@ -68,4 +68,4 @@ class Config:
         """model config"""
 
         env_file = ".env"
-        env_prefix = "STACK_"
+        env_prefix = "TITILER_STACK_"
diff --git a/docker-compose.yml b/docker-compose.yml
index 3a5a94754..3535a9c12 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,6 +21,6 @@ services:
       - VSI_CACHE=TRUE
       - VSI_CACHE_SIZE=536870912
       - WORKERS_PER_CORE=1
-      # - API_DISABLE_STAC=TRUE
-      # - API_DISABLE_MOSAIC=TRUE
-      # - API_DISABLE_COG=TRUE
+      # - TITILER_API_DISABLE_STAC=TRUE
+      # - TITILER_API_DISABLE_MOSAIC=TRUE
+      # - TITILER_API_DISABLE_COG=TRUE
diff --git a/docs/deployment/aws/ecs.md b/docs/deployment/aws/ecs.md
index d5a51ae10..595c99e05 100644
--- a/docs/deployment/aws/ecs.md
+++ b/docs/deployment/aws/ecs.md
@@ -34,9 +34,9 @@ The example handles tasks such as generating a docker image and setting up an ap
 3. Update settings (see [intro.md](intro.md))
 
     ```bash
-    export TITILER_PROJECT="mytiler"
-    export TITILER_STAGE="dev"
-    export TITILER_MIN_ECS_INSTANCES=10
+    export TITILER_STACK_NAME="mytiler"
+    export TITILER_STACK_STAGE="dev"
+    export TITILER_STACK_MIN_ECS_INSTANCES=10
     ```
 
     Available settings for ECS:
diff --git a/docs/deployment/aws/intro.md b/docs/deployment/aws/intro.md
index 4ae010194..612bce8b0 100644
--- a/docs/deployment/aws/intro.md
+++ b/docs/deployment/aws/intro.md
@@ -6,23 +6,23 @@ Example of of AWS deployments can be found in https://github.com/developmentseed
 
 Deployment settings are managed via [pydantic.BaseSettings](https://pydantic-docs.helpmanual.io/usage/settings/) and stored in [config.py](https://github.com/developmentseed/titiler/blob/master/stack/config.py). Pydantic BaseSettings can receive input to overwrite the default value from `.env` file or from environment variables.
 
-Variables in `.env` or in environment variable need to be prefixed with `STACK_`:
+Variables in `.env` or in environment variable need to be prefixed with `TITILER_STACK_`:
 
 
 ```bash
-STACK_NAME="my-tiler"
-STACK_STAGE="dev"
+TITILER_STACK_NAME="my-tiler"
+TITILER_STACK_STAGE="dev"
 
-STACK_BUCKETS='["my-bucket*", "*"]'
-STACK_MOSAIC_HOST="my-bucket/mosaics"
+TITILER_STACK_BUCKETS='["my-bucket*", "*"]'
+TITILER_STACK_MOSAIC_HOST="my-bucket/mosaics"
 
-STACK_MEMORY=3008
+TITILER_STACK_MEMORY=3008
 
 # Uncomment to allow lambda to access content on requester-payer buckets
-# STACK_ADDITIONAL_ENV='{"AWS_REQUEST_PAYER":"requester"}'
+# TITILER_STACK_ADDITIONAL_ENV='{"AWS_REQUEST_PAYER":"requester"}'
 
 # Uncomment if you only on the /cog endpoint
-# STACK_ADDITIONAL_ENV='{"API_DISABLE_STAC": "TRUE", "API_DISABLE_MOSAIC": "TRUE"}'
+# TITILER_STACK_ADDITIONAL_ENV='{"TITILER_API_DISABLE_STAC": "TRUE", "TITILER_API_DISABLE_MOSAIC": "TRUE"}'
 ```
 
 Default values from [config.py](https://github.com/developmentseed/titiler/blob/master/deployment/aws/cdk/config.py):
diff --git a/docs/deployment/aws/lambda.md b/docs/deployment/aws/lambda.md
index 300812515..fc0c469cf 100644
--- a/docs/deployment/aws/lambda.md
+++ b/docs/deployment/aws/lambda.md
@@ -38,9 +38,9 @@ The Lambda stack is also deployed by the [AWS CDK](https://aws.amazon.com/cdk/)
 3. Update settings (see [intro.md](intro.md))
 
     ```bash
-    export TITILER_PROJECT="mytiler"
-    export TITILER_STAGE="dev"
-    export TITILER_MEMORY=512
+    export TITILER_STACK_NAME="mytiler"
+    export TITILER_STACK_STAGE="dev"
+    export TITILER_STACK_MEMORY=512
     ```
 
     Available settings for AWS Lambda:
diff --git a/tests/conftest.py b/tests/conftest.py
index a36d7bda9..1b31e0caf 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -22,7 +22,7 @@ def set_env(monkeypatch):
     monkeypatch.setenv("AWS_REGION", "us-west-2")
     monkeypatch.delenv("AWS_PROFILE", raising=False)
     monkeypatch.setenv("AWS_CONFIG_FILE", "/tmp/noconfigheere")
-    monkeypatch.setenv("API_CACHECONTROL", "private, max-age=3600")
+    monkeypatch.setenv("TITILER_API_CACHECONTROL", "private, max-age=3600")
 
 
 @pytest.fixture(autouse=True)
diff --git a/titiler/settings.py b/titiler/settings.py
index 2fbd60d91..6a4909a5d 100644
--- a/titiler/settings.py
+++ b/titiler/settings.py
@@ -24,4 +24,4 @@ class Config:
         """model config"""
 
         env_file = ".env"
-        env_prefix = "API_"
+        env_prefix = "TITILER_API_"