diff --git a/Gemfile b/Gemfile
index 1dffed3..dfefe40 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ ruby '~>2.6'
 
 gem 'active_paypal_adaptive_payment', '0.3.16'
 gem 'aws-sdk-s3', '1.126.0'
-gem 'aws-sdk-sns', '1.55.0'
+gem 'aws-sdk-sns', '1.70.0'
 gem 'backports', '3.23.0'
 gem 'backtrace', '0.4.0'
 gem 'bitcoin-ruby', '~>0.0.19'
diff --git a/Gemfile.lock b/Gemfile.lock
index 32f9415..413a4d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,8 +41,8 @@ GEM
       aws-sdk-core (~> 3, >= 3.174.0)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.4)
-    aws-sdk-sns (1.55.0)
-      aws-sdk-core (~> 3, >= 3.127.0)
+    aws-sdk-sns (1.70.0)
+      aws-sdk-core (~> 3, >= 3.188.0)
       aws-sigv4 (~> 1.1)
     aws-sigv4 (1.8.0)
       aws-eventstream (~> 1, >= 1.0.2)
@@ -362,7 +362,7 @@ PLATFORMS
 DEPENDENCIES
   active_paypal_adaptive_payment (= 0.3.16)
   aws-sdk-s3 (= 1.126.0)
-  aws-sdk-sns (= 1.55.0)
+  aws-sdk-sns (= 1.70.0)
   backports (= 3.23.0)
   backtrace (= 0.4.0)
   bitcoin-ruby (~> 0.0.19)