diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f8eb6da9..87031eb8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -73,7 +73,7 @@ jobs:
 
     - run: bundle exec rake VERBOSE=1
       env:
-        TIMEOUT_SEC: 180
+        TIMEOUT_SEC: 480
 
     - run: rake build
 
diff --git a/.github/workflows/nmatrix.yml b/.github/workflows/nmatrix.yml
index f1616777..07937fa1 100644
--- a/.github/workflows/nmatrix.yml
+++ b/.github/workflows/nmatrix.yml
@@ -66,7 +66,7 @@ jobs:
 
     - run: bundle exec rake VERBOSE=1
       env:
-        TIMEOUT_SEC: 180
+        TIMEOUT_SEC: 480
 
     - run: rake build
 
diff --git a/.github/workflows/pycall.yml b/.github/workflows/pycall.yml
index 1dc1e507..a0bd253e 100644
--- a/.github/workflows/pycall.yml
+++ b/.github/workflows/pycall.yml
@@ -86,5 +86,5 @@ jobs:
     - run: bundle exec rake VERBOSE=1
       env:
         PYTHON: python
-        TIMEOUT_SEC: 180
+        TIMEOUT_SEC: 480
       continue-on-error: ${{ matrix.python == '2.x' }}