diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 3ffebe8a..7266daef 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -165,7 +165,6 @@ GEM
       actionmailer (>= 5.0)
       devise (>= 4.6)
     diff-lcs (1.6.2)
-    docile (1.4.0)
     dotenv (3.1.0)
     dotenv-rails (3.1.0)
       dotenv (= 3.1.0)
@@ -453,12 +452,7 @@ GEM
       logger
       rack (>= 2.2.4)
       redis-client (>= 0.22.2)
-    simplecov (0.22.0)
-      docile (~> 1.1)
-      simplecov-html (~> 0.11)
-      simplecov_json_formatter (~> 0.1)
-    simplecov-html (0.12.3)
-    simplecov_json_formatter (0.1.4)
+    simplecov (1.0.3)
     sixarm_ruby_unaccent (1.2.0)
     smart_properties (1.17.0)
     sprockets (4.2.2)