diff --git a/Gemfile.lock b/Gemfile.lock
index 2e3045d80a..ee5e745df4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -505,7 +505,7 @@ GEM
     parser (3.2.2.3)
       ast (~> 2.4.1)
       racc
-    pdf-reader (2.11.0)
+    pdf-reader (2.12.0)
       Ascii85 (~> 1.0)
       afm (~> 0.2.1)
       hashery (~> 2.0)