diff --git a/.github/workflows/code_analysis.yaml b/.github/workflows/code_analysis.yaml
index 87a9a1b5..67b39a19 100644
--- a/.github/workflows/code_analysis.yaml
+++ b/.github/workflows/code_analysis.yaml
@@ -6,6 +6,10 @@ on:
         branches:
             - main
 
+env:
+    # see https://github.com/composer/composer/issues/9368#issuecomment-718112361
+    COMPOSER_ROOT_VERSION: "dev-main"
+
 jobs:
     code_analysis:
         runs-on: ubuntu-latest
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index ea75389a..031a052f 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -6,6 +6,10 @@ on:
         branches:
             - main
 
+env:
+    # see https://github.com/composer/composer/issues/9368#issuecomment-718112361
+    COMPOSER_ROOT_VERSION: "dev-main"
+
 jobs:
     tests:
         runs-on: ubuntu-latest