diff --git a/Gemfile.lock b/Gemfile.lock
index 7d5236ab..7605e5d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,7 +103,8 @@ GEM
     coderay (1.1.3)
     concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
-    crack (0.4.5)
+    crack (0.4.6)
+      bigdecimal
       rexml
     crass (1.0.6)
     cucumber (9.0.2)
@@ -219,7 +220,7 @@ GEM
       govuk_app_config (>= 1.1)
       redis-namespace (~> 1.6)
       sidekiq (~> 6.5, >= 6.5.12)
-    hashdiff (1.0.1)
+    hashdiff (1.1.0)
     hashie (5.0.0)
     http-accept (1.7.0)
     http-cookie (1.0.5)
@@ -701,7 +702,7 @@ GEM
       rack (>= 2.0.9)
     warden-oauth2 (0.0.1)
       warden
-    webmock (3.19.1)
+    webmock (3.20.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)