diff --git a/Gemfile.lock b/Gemfile.lock
index c712c8f..e0d463f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
-    pkg-config (1.5.5)
+    pkg-config (1.5.6)
     racc (1.7.3)
     rainbow (3.1.1)
     rake (13.1.0)