diff --git a/30_sources/SRC_Zupfnoter/Gemfile.lock b/30_sources/SRC_Zupfnoter/Gemfile.lock
index 9b6cf597..aaef95b2 100644
--- a/30_sources/SRC_Zupfnoter/Gemfile.lock
+++ b/30_sources/SRC_Zupfnoter/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     rack (2.0.6)
-    rake (12.3.2)
+    rake (12.3.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)