diff --git a/Gemfile.lock b/Gemfile.lock
index 50dc49605c..a9b0a62552 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,8 +57,6 @@ GEM
   remote: https://rubygems.org/
   specs:
     Ascii85 (1.1.0)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
     actioncable (6.0.3.7)
       actionpack (= 6.0.3.7)
       nio4r (~> 2.0)
@@ -415,7 +413,7 @@ GEM
       xml-simple
     paypal-sdk-merchant (1.117.2)
       paypal-sdk-core (~> 0.3.0)
-    pdf-reader (2.4.2)
+    pdf-reader (2.5.0)
       Ascii85 (~> 1.0)
       afm (~> 0.2.1)
       hashery (~> 2.0)