diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bf2e6a22d..46d9bcf70 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,7 +19,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  #CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
+  CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
 
 jobs:
   build:
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 187de1685..57e10fffe 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -8,7 +8,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  #CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
+  CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
 
 jobs:
   test: