diff --git a/build.gradle b/build.gradle
index 7f2ad7c..76b12fa 100755
--- a/build.gradle
+++ b/build.gradle
@@ -34,31 +34,35 @@ subprojects {
     maxHeapSize = '4G'
   }
 
+  ext {
+    awsSdkVersion = '1.12.39'
+  }
+
   dependencies {
-    compile 'com.amazonaws:aws-java-sdk-autoscaling:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-cloudwatch:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-config:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-core:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-dynamodb:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-ec2:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-ecs:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-efs:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-elasticache:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-elasticloadbalancing:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-elasticloadbalancingv2:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-elasticsearch:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-iam:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-lambda:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-rds:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-route53:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-s3:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-ses:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-sns:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-sqs:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-ssm:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-sts:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-support:1.11.1009'
-    compile 'com.amazonaws:aws-java-sdk-xray:1.11.1009'
+    compile "com.amazonaws:aws-java-sdk-autoscaling:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-cloudwatch:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-config:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-core:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-dynamodb:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-ec2:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-ecs:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-efs:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-elasticache:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-elasticloadbalancing:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-elasticloadbalancingv2:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-elasticsearch:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-iam:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-lambda:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-rds:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-route53:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-s3:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-ses:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-sns:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-sqs:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-ssm:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-sts:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-support:${awsSdkVersion}"
+    compile "com.amazonaws:aws-java-sdk-xray:${awsSdkVersion}"
     compile 'com.fasterxml.jackson.core:jackson-databind:2.12.3'
     testCompile 'junit:junit:4.10'
     testCompile 'com.google.guava:guava:18.0'