diff --git a/sig/manifest.yaml b/sig/manifest.yaml
index 3ce55e80..85138a6b 100644
--- a/sig/manifest.yaml
+++ b/sig/manifest.yaml
@@ -1,5 +1,4 @@
 dependencies:
-  - name: base64
   - name: digest
   - name: forwardable
   - name: openssl