diff --git a/Gemfile.lock b/Gemfile.lock
index 85d012f7..a37f317c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -219,7 +219,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     nokogiri (1.10.1-java)
     orm_adapter (0.0.7)
-    pdfkit (0.8.2)
+    pdfkit (0.8.7)
     polyglot (0.3.5)
     power_assert (1.1.3)
     public_suffix (3.0.3)