diff --git a/Gemfile.lock b/Gemfile.lock
index 360ef3d..4beb9f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,8 +45,8 @@ GEM
     byebug (11.1.3)
     coderay (1.1.3)
     concurrent-ruby (1.1.5)
-    crack (0.4.3)
-      safe_yaml (~> 1.0.0)
+    crack (0.4.5)
+      rexml
     crass (1.0.5)
     diff-lcs (1.3)
     docile (1.4.0)
@@ -76,7 +76,7 @@ GEM
     gitlab (4.17.0)
       httparty (~> 0.18)
       terminal-table (~> 1.5, >= 1.5.1)
-    hashdiff (1.0.0)
+    hashdiff (1.0.1)
     httparty (0.18.1)
       mime-types (~> 3.0)
       multi_xml (>= 0.5.2)
@@ -194,7 +194,6 @@ GEM
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.4)
     rugged (1.0.1)
-    safe_yaml (1.0.5)
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
@@ -219,7 +218,7 @@ GEM
     uuid (2.3.9)
       macaddr (~> 1.0)
     valid (1.2.0)
-    webmock (3.7.6)
+    webmock (3.13.0)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)