diff --git a/Gemfile.lock b/Gemfile.lock
index a380161..b38f184 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,8 +77,7 @@ GEM
     regexp_parser (2.2.1)
     reverse_markdown (1.3.0)
       nokogiri
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.9)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -126,7 +125,6 @@ GEM
       thor (~> 0.19, >= 0.19.4)
       tilt (~> 2.0)
       yard (~> 0.9)
-    strscan (3.1.0)
     thor (0.20.3)
     tilt (2.0.10)
     timecop (0.9.5)