diff --git a/Gemfile.lock b/Gemfile.lock
index f4175dd7..427cbac8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1051,8 +1051,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.7)
     connection_pool (2.2.3)
-    crack (0.4.3)
-      safe_yaml (~> 1.0.0)
+    crack (0.4.4)
     crass (1.0.6)
     csv (3.1.7)
     cucumber (4.1.0)
@@ -1300,7 +1299,7 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.5)
+    public_suffix (4.0.6)
     puma (4.3.5)
       nio4r (~> 2.0)
     puma-heroku (1.1.0)
@@ -1431,7 +1430,6 @@ GEM
     ruby-vips (2.0.17)
       ffi (~> 1.9)
     rubyzip (2.0.0)
-    safe_yaml (1.0.5)
     sanitize (5.2.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.8.0)
@@ -1512,7 +1510,7 @@ GEM
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
       railties (>= 6.0.0)
-    webmock (3.8.3)
+    webmock (3.9.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)