diff --git a/.github/workflows/sign.yaml b/.github/workflows/sign.yaml
index f5baf79..a9756ac 100644
--- a/.github/workflows/sign.yaml
+++ b/.github/workflows/sign.yaml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: ['3.2', '3.3']
+        version: ['3.2', '3.3', '3.4']
     permissions:
       packages: write
       id-token: write
diff --git a/build-matrix.json b/build-matrix.json
index 3c73119..37e4b3d 100644
--- a/build-matrix.json
+++ b/build-matrix.json
@@ -12,6 +12,13 @@
                 "3", "3", "6"
             ],
             "checksum": "8dc48fffaf270f86f1019053f28e51e4da4cce32a36760a0603a9aee67d7fd8d",
+            "extra": ""
+        },
+        {
+            "rubyver": [
+                "3", "4", "1"
+            ],
+            "checksum": "068c8523442174bd3400e786f4a6952352c82b1b9f6210fd17fb4823086d3379",
             "extra": "latest"
         }
     ],