diff --git a/.github/workflows/cygwin-51x.yml b/.github/workflows/cygwin-51x.yml
index 8041fa28..df8c6b4c 100644
--- a/.github/workflows/cygwin-51x.yml
+++ b/.github/workflows/cygwin-51x.yml
@@ -13,4 +13,4 @@ jobs:
       runs_on: windows-latest
       compiler: ocaml-variants.5.1.1+options+win
       cygwin: true
-      timeout: 360
+      timeout: 240
diff --git a/.github/workflows/cygwin-520.yml b/.github/workflows/cygwin-520.yml
index e0d5cf34..d26f8f01 100644
--- a/.github/workflows/cygwin-520.yml
+++ b/.github/workflows/cygwin-520.yml
@@ -14,4 +14,4 @@ jobs:
       runs_on: windows-latest
       compiler: ocaml-variants.5.2.0~beta1+options+win
       cygwin: true
-      timeout: 360
+      timeout: 240
diff --git a/.github/workflows/cygwin-530-trunk.yml b/.github/workflows/cygwin-530-trunk.yml
index edb839a7..5551247e 100644
--- a/.github/workflows/cygwin-530-trunk.yml
+++ b/.github/workflows/cygwin-530-trunk.yml
@@ -15,4 +15,4 @@ jobs:
       compiler: ocaml.5.3.0
       cygwin: true
       compiler_git_ref: refs/heads/trunk
-      timeout: 360
+      timeout: 240