diff --git a/.woodpecker.yml b/.woodpecker.yml
index 9408700d..24bb4be0 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -29,9 +29,9 @@ pipeline:
 
 matrix:
   include:
-  - ALPINE_VERSION: 3.17.1
-    RUBY_VERSION: 3.1
-    RUBY_PATCH: 2
-  - ALPINE_VERSION: 3.14.8
-    RUBY_VERSION: 2.7
-    RUBY_PATCH: 6
+  - ALPINE_VERSION: "3.17.1"
+    RUBY_VERSION: "3.1"
+    RUBY_PATCH: "3"
+  - ALPINE_VERSION: "3.14.8"
+    RUBY_VERSION: "2.7"
+    RUBY_PATCH: "7"