diff --git a/Gemfile.lock b/Gemfile.lock
index a661dd6..7de5ecb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ PATH
       activesupport (~> 6.0.3, >= 6.0.3.1)
       dotenv (~> 2.7)
       json_api_client (~> 1.16)
-      rack (~> 2.2)
+      rack (>= 2.2, < 4.0)
       rest-client (~> 2.1)
 
 GEM
@@ -54,7 +54,7 @@ GEM
     parser (3.0.0.0)
       ast (~> 2.4.1)
     public_suffix (4.0.6)
-    rack (2.2.3)
+    rack (3.0.7)
     rainbow (3.0.0)
     rake (13.0.1)
     regexp_parser (2.0.3)
diff --git a/core-client.gemspec b/core-client.gemspec
index f32baca..c13adf4 100644
--- a/core-client.gemspec
+++ b/core-client.gemspec
@@ -36,5 +36,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency "json_api_client", "~> 1.16"
   spec.add_dependency "rest-client", "~> 2.1"
   spec.add_dependency "activesupport", "~> 6.0.3", ">= 6.0.3.1"
-  spec.add_dependency "rack", "~> 2.2"
+  spec.add_dependency "rack", ">= 2.2", "< 4.0"
 end