diff --git a/Gemfile b/Gemfile
index babb7c3a1..88330b073 100644
--- a/Gemfile
+++ b/Gemfile
@@ -71,7 +71,7 @@ gem "activerecord-import", "0.7.0"
 
 gem "carrierwave", "0.10.0"
 gem "fog",         "1.30.0"
-gem "mini_magick", "4.2.0"
+gem "mini_magick", "4.2.3"
 gem "remotipart",  "1.2.1"
 
 # GUID generation
diff --git a/Gemfile.lock b/Gemfile.lock
index fa9346435..4240fbb74 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -395,7 +395,7 @@ GEM
     messagebus_ruby_api (1.0.3)
     method_source (0.8.2)
     mime-types (2.5)
-    mini_magick (4.2.0)
+    mini_magick (4.2.3)
     mini_portile (0.6.2)
     minitest (5.6.1)
     mobile-fu (1.3.1)
@@ -757,7 +757,7 @@ DEPENDENCIES
   json (= 1.8.2)
   markerb (= 1.0.2)
   messagebus_ruby_api (= 1.0.3)
-  mini_magick (= 4.2.0)
+  mini_magick (= 4.2.3)
   minitest
   mobile-fu (= 1.3.1)
   mysql2 (= 0.3.18)