diff --git a/environment.yml b/environment.yml
index 55d49e65..285c1663 100644
--- a/environment.yml
+++ b/environment.yml
@@ -5,4 +5,4 @@ dependencies:
   - python=3.10.*
   - mamba
   - poetry=1.*
-  - gdal=3.4.1
+  - gdal=3.4.1  # same as in Dockerfile and pyproject.toml
diff --git a/pyproject.toml b/pyproject.toml
index 0d2fce3f..49dbcdf8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ PyMuPDF = {extras = ["Pillow"], version = "^1.21.0"}
 psycopg2 = "^2.9.5"
 plotly = "^5.15.0"
 kaleido = "0.2.1"  # Not working with '^', cf. https://github.com/plotly/Kaleido/issues/125
-gdal = {version = "3.4.1", extras = ["numpy"]}
+gdal = {version = "3.4.1", extras = ["numpy"]}  # same as in Dockerfile and environment.yml
 geojson = "^2.5.0"
 matplotlib-scalebar = "^0.8.1"
 redis = "^4.5.4"