diff --git a/Gemfile b/Gemfile
index 7cedc733..819deb57 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,7 +20,7 @@ end
 group :development, :test do
   gem 'rack_session_access'
   gem 'capybara'
-  gem 'selenium-webdriver', '~> 3.142.7'
+  gem 'selenium-webdriver', '~> 4.8.1'
   gem 'faker', '~> 2.21.0'
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 553d3fa5..d49564d3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,7 +58,6 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    childprocess (3.0.0)
     climate_control (0.2.0)
     concurrent-ruby (1.1.10)
     crass (1.0.6)
@@ -199,9 +198,10 @@ GEM
     ruby-openid (2.9.2)
     ruby-progressbar (1.11.0)
     rubyzip (2.3.2)
-    selenium-webdriver (3.142.7)
-      childprocess (>= 0.5, < 4.0)
-      rubyzip (>= 1.2.2)
+    selenium-webdriver (4.8.1)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
     simplecov (0.21.2)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -229,6 +229,7 @@ GEM
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (2.2.0)
+    websocket (1.2.9)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -267,7 +268,7 @@ DEPENDENCIES
   rubocop (~> 1.31.2)
   rubocop-performance
   ruby-openid
-  selenium-webdriver (~> 3.142.7)
+  selenium-webdriver (~> 4.8.1)
   simplecov
   skylight
   terrapin (~> 0.6.0)