diff --git a/api/Gemfile.lock b/api/Gemfile.lock
index 6d9d1766..3c2e80ff 100644
--- a/api/Gemfile.lock
+++ b/api/Gemfile.lock
@@ -242,8 +242,7 @@ GEM
       railties (>= 5.2)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.9)
     rspec-core (3.13.0)
       rspec-support (~> 3.13.0)
     rspec-expectations (3.13.1)
@@ -301,7 +300,6 @@ GEM
       listen (>= 2.7, < 4.0)
       spring (>= 4)
     stringio (3.1.1)
-    strscan (3.1.0)
     thor (1.3.1)
     tilt (2.3.0)
     timeout (0.4.1)