diff --git a/Gemfile.lock b/Gemfile.lock
index be9441d5..5629e024 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,8 @@ GEM
     rchardet (1.8.0)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (4.2.0)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)
@@ -111,6 +112,7 @@ GEM
     sawyer (0.9.2)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.5.0)