diff --git a/Gemfile.lock b/Gemfile.lock
index 6bf147ee..dcb67560 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,21 +6,21 @@ GEM
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.3)
-    docile (1.1.5)
+    docile (1.3.0)
     ethon (0.11.0)
       ffi (>= 1.3.0)
-    ffi (1.9.18)
+    ffi (1.9.23)
     hashdiff (0.3.7)
     json (2.1.0)
     mini_portile2 (2.3.0)
-    nokogiri (1.8.1)
+    nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
-    public_suffix (3.0.1)
+    public_suffix (3.0.2)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)
       rspec-expectations (~> 3.7.0)
       rspec-mocks (~> 3.7.0)
-    rspec-core (3.7.0)
+    rspec-core (3.7.1)
       rspec-support (~> 3.7.0)
     rspec-expectations (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
@@ -31,11 +31,11 @@ GEM
     rspec-mocks (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.7.0)
-    rspec-support (3.7.0)
+    rspec-support (3.7.1)
     ruby-progressbar (1.9.0)
     safe_yaml (1.0.4)
-    simplecov (0.15.1)
-      docile (~> 1.1.0)
+    simplecov (0.16.1)
+      docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
@@ -43,12 +43,12 @@ GEM
       unicode-display_width (~> 1.1, >= 1.1.1)
     typhoeus (1.3.0)
       ethon (>= 0.9.0)
-    unicode-display_width (1.3.0)
-    webmock (3.1.0)
+    unicode-display_width (1.3.2)
+    webmock (3.4.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
-    yajl-ruby (1.3.1)
+    yajl-ruby (1.4.0)
 
 PLATFORMS
   ruby
@@ -66,4 +66,4 @@ DEPENDENCIES
   yajl-ruby (>= 1.3.0)
 
 BUNDLED WITH
-   1.16.0
+   1.16.1
diff --git a/bin/update_gems b/bin/update_gems
index 4dbc9670..85749b18 100755
--- a/bin/update_gems
+++ b/bin/update_gems
@@ -9,4 +9,4 @@ done
 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
 
 cd $DIR/../
-docker run -it --rm -v "$DIR/../":/wpscan -w /wpscan ruby:2.4 /bin/bash -c "gem install bundler; bundle update"
+docker run --rm -v "$DIR/../":/usr/src/app -w /usr/src/app ruby:2.5-alpine /bin/sh -c "gem install bundler; bundle lock --update"