diff --git a/Gemfile.lock b/Gemfile.lock
index 24cc6168..5846f8e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
   specs:
-    Ascii85 (1.0.3)
+    Ascii85 (1.1.0)
     actioncable (5.2.6)
       actionpack (= 5.2.6)
       nio4r (~> 2.0)
@@ -368,8 +368,8 @@ GEM
     pdf-core (0.9.0)
     pdf-inspector (1.3.0)
       pdf-reader (>= 1.0, < 3.0.a)
-    pdf-reader (2.2.0)
-      Ascii85 (~> 1.0.0)
+    pdf-reader (2.5.0)
+      Ascii85 (~> 1.0)
       afm (~> 0.2.1)
       hashery (~> 2.0)
       ruby-rc4