diff --git a/launchdarkly-openfeature-server-sdk.gemspec b/launchdarkly-openfeature-server-sdk.gemspec
index 21e19df..e6f27f1 100644
--- a/launchdarkly-openfeature-server-sdk.gemspec
+++ b/launchdarkly-openfeature-server-sdk.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_runtime_dependency "launchdarkly-server-sdk", "~> 8.15"
-  spec.add_runtime_dependency "openfeature-sdk", "~> 0.6.1"
+  spec.add_runtime_dependency "openfeature-sdk", ">= 0.6.1", "< 0.9"
 
   # For more information and examples about making a new gem, check out our
   # guide at: https://bundler.io/guides/creating_gem.html