diff --git a/Gemfile b/Gemfile
index 1561ae4f..854b217e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -21,8 +21,8 @@ gem "simple_form", "~> 4.0.0"
 gem "title"
 gem "uglifier"
 gem "unicorn"
-gem "devise", "~> 3.5.2"
-gem "devise_invitable", "~> 1.5.5"
+gem "devise", "~> 4.7.1"
+gem "devise_invitable"
 gem "apartment", "~> 0.26.0"
 gem "pikaday-gem", "~> 1.2.0.0"
 gem "momentjs-rails"
diff --git a/Gemfile.lock b/Gemfile.lock
index ed0dae5c..f8b9cd6a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -589,7 +589,7 @@ GEM
       aws-sigv4 (~> 1.0)
     aws-sigv2 (1.0.1)
     aws-sigv4 (1.0.2)
-    bcrypt (3.1.11)
+    bcrypt (3.1.13)
     better_errors (2.5.1)
       coderay (>= 1.0.0)
       erubi (>= 1.0.0)
@@ -645,16 +645,15 @@ GEM
     delayed_job_active_record (4.0.3)
       activerecord (>= 3.0, < 5.0)
       delayed_job (>= 3.0, < 4.1)
-    devise (3.5.10)
+    devise (4.7.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 3.2.6, < 5)
+      railties (>= 4.1.0)
       responders
-      thread_safe (~> 0.1)
       warden (~> 1.2.3)
-    devise_invitable (1.5.5)
-      actionmailer (>= 3.2.6, < 5)
-      devise (>= 3.2.0)
+    devise_invitable (1.7.5)
+      actionmailer (>= 4.1.0)
+      devise (>= 4.0.0)
     diff-lcs (1.3)
     docile (1.1.5)
     dotenv (0.11.1)
@@ -795,15 +794,15 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.19.0)
-    rake (12.3.2)
+    rake (13.0.1)
     rbtree3 (0.5.0)
     recipient_interceptor (0.1.2)
       mail
     redcarpet (3.4.0)
     regexp_parser (1.6.0)
-    responders (2.4.0)
-      actionpack (>= 4.2.0, < 5.3)
-      railties (>= 4.2.0, < 5.3)
+    responders (2.4.1)
+      actionpack (>= 4.2.0, < 6.0)
+      railties (>= 4.2.0, < 6.0)
     rspec-core (3.8.0)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.2)
@@ -912,8 +911,8 @@ DEPENDENCIES
   dalli
   database_cleaner
   delayed_job_active_record (= 4.0.3)
-  devise (~> 3.5.2)
-  devise_invitable (~> 1.5.5)
+  devise (~> 4.7.1)
+  devise_invitable
   dotenv-rails
   email_spec
   email_validator
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 0bd8fb0c..f144e6dc 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -10,8 +10,9 @@ class ApplicationController < ActionController::Base
   protected
 
   def configure_permitted_parameters
-    devise_parameter_sanitizer.for(:accept_invitation).
-      concat([:first_name, :last_name])
+    devise_parameter_sanitizer.permit(
+      :accept_invitation, keys: [:first_name, :last_name]
+    )
   end
 
   def authenticate_inviter!