diff --git a/.github/workflows/build_slim_packages.yaml b/.github/workflows/build_slim_packages.yaml
index a13c11f11..da63fd5fb 100644
--- a/.github/workflows/build_slim_packages.yaml
+++ b/.github/workflows/build_slim_packages.yaml
@@ -39,7 +39,7 @@ jobs:
       with:
         # dialyzer PLTs
         path: ~/.cache/rebar3/
-        key: dialyer-${{ matrix.otp }}
+        key: dialyzer-${{ matrix.otp }}
     - name: make xref
       run: make xref
     - name: make dialyzer