diff --git a/lib/splitclient-rb/cache/repositories/impressions/redis_repository.rb b/lib/splitclient-rb/cache/repositories/impressions/redis_repository.rb
index 0a59c123..d9f8a098 100644
--- a/lib/splitclient-rb/cache/repositories/impressions/redis_repository.rb
+++ b/lib/splitclient-rb/cache/repositories/impressions/redis_repository.rb
@@ -14,6 +14,7 @@ def initialize(config)
 
           def add_bulk(impressions)
             impressions_json = impressions.map do |impression|
+              impression[:i][:properties] = impression[:i][:properties].to_json.to_s unless impression[:i][:properties].nil?
               impression.to_json
             end
 
diff --git a/lib/splitclient-rb/version.rb b/lib/splitclient-rb/version.rb
index d45f095e..adf700f9 100644
--- a/lib/splitclient-rb/version.rb
+++ b/lib/splitclient-rb/version.rb
@@ -1,3 +1,3 @@
 module SplitIoClient
-  VERSION = '8.10.0'
+  VERSION = '8.10.1-rc1'
 end
diff --git a/spec/cache/senders/impressions_formatter_spec.rb b/spec/cache/senders/impressions_formatter_spec.rb
index 6c649a48..79b20c03 100644
--- a/spec/cache/senders/impressions_formatter_spec.rb
+++ b/spec/cache/senders/impressions_formatter_spec.rb
@@ -92,29 +92,55 @@
         ]
       )
 
-      expect(formatted_impressions.find { |i| i[:f] == :foo2 }[:i]).to match_array(
-        [
-          {
-            k: 'matching_key2',
-            t: 'off',
-            m: 1_478_113_518_285,
-            b: 'foo2',
-            r: 'custom_label2',
-            c: 123_499,
-            pt: nil
-          },
-          {
-            k: 'matching_key3',
-            t: 'off',
-            m: 1_478_113_518_900,
-            b: nil,
-            r: nil,
-            c: nil,
-            pt: nil,
-            properties: '{"prop":"val"}'
-          }
-        ]
-      )
+      if cache_adapter == :redis        
+        expect(formatted_impressions.find { |i| i[:f] == :foo2 }[:i]).to match_array(
+          [
+            {
+              k: 'matching_key2',
+              t: 'off',
+              m: 1_478_113_518_285,
+              b: 'foo2',
+              r: 'custom_label2',
+              c: 123_499,
+              pt: nil
+            },
+            {
+              k: 'matching_key3',
+              t: 'off',
+              m: 1_478_113_518_900,
+              b: nil,
+              r: nil,
+              c: nil,
+              pt: nil,
+              properties: '"{\"prop\":\"val\"}"'
+            }
+          ]
+        )
+      else
+        expect(formatted_impressions.find { |i| i[:f] == :foo2 }[:i]).to match_array(
+          [
+            {
+              k: 'matching_key2',
+              t: 'off',
+              m: 1_478_113_518_285,
+              b: 'foo2',
+              r: 'custom_label2',
+              c: 123_499,
+              pt: nil
+            },
+            {
+              k: 'matching_key3',
+              t: 'off',
+              m: 1_478_113_518_900,
+              b: nil,
+              r: nil,
+              c: nil,
+              pt: nil,
+              properties: '{"prop":"val"}'
+            }
+          ]
+        )
+      end
     end
 
     it 'filters out impressions with the same key/treatment' do
diff --git a/spec/cache/senders/impressions_sender_spec.rb b/spec/cache/senders/impressions_sender_spec.rb
index ccb5b885..3db870f7 100644
--- a/spec/cache/senders/impressions_sender_spec.rb
+++ b/spec/cache/senders/impressions_sender_spec.rb
@@ -55,6 +55,8 @@
     end
 
     it 'post impressions with corresponding impressions metadata' do
+      skip "Test is not relevant for redis" if cache_adapter == :redis
+
       stub_request(:post, 'https://events.split.io/api/testImpressions/bulk')
         .to_return(status: 200, body: 'ok')
 
@@ -99,6 +101,7 @@
     end
 
     it 'calls #post_impressions upon destroy' do
+      skip "Test is not relevant for redis" if cache_adapter == :redis
       stub_request(:post, 'https://events.split.io/api/testImpressions/bulk').to_return(status: 200, body: '')
 
       sender.call