diff --git a/.github/workflows/build_python.yml b/.github/workflows/build_python.yml
index 21157bb54..ec9f4c28f 100644
--- a/.github/workflows/build_python.yml
+++ b/.github/workflows/build_python.yml
@@ -12,7 +12,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     strategy:
       matrix:
-        python: [ 3.9 ]
+        python: [ 3.9.5 ]
         numpy: [ 1.21.5 ]
         gdal: [ 3.4.3 ]
         spark: [ 3.2.1 ]
diff --git a/.github/workflows/build_r.yml b/.github/workflows/build_r.yml
index b7b2dfb56..6e725ebd1 100644
--- a/.github/workflows/build_r.yml
+++ b/.github/workflows/build_r.yml
@@ -13,7 +13,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     strategy:
       matrix:
-        python: [ 3.9 ]
+        python: [ 3.9.5 ]
         numpy: [ 1.21.5 ]
         gdal: [ 3.4.3 ]
         spark: [ 3.2.1 ]
diff --git a/.github/workflows/build_scala.yml b/.github/workflows/build_scala.yml
index a2f04d2ca..0d25ee63c 100644
--- a/.github/workflows/build_scala.yml
+++ b/.github/workflows/build_scala.yml
@@ -11,7 +11,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     strategy:
       matrix:
-        python: [ 3.9 ]
+        python: [ 3.9.5 ]
         numpy: [ 1.21.5 ]
         gdal: [ 3.4.3 ]
         spark: [ 3.2.1 ]