diff --git a/build.gradle b/build.gradle
index 5cfa4f790a..46b381b7d7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -270,7 +270,17 @@ ext.deployable << project(':nf-google')
 
 protected error(String message) {
     logger.error message
-    throw new StopExecutionException()
+    throw new StopExecutionException(message)
+}
+
+protected checkVersionExits(String version) {
+    if(version.endsWith('-SNAPSHOT'))
+        return
+
+    def cmd = "AWS_ACCESS_KEY_ID=${System.env.NXF_AWS_ACCESS} AWS_SECRET_ACCESS_KEY=${System.env.NXF_AWS_SECRET} aws s3 ls s3://www2.nextflow.io/releases/v$version/nextflow"
+    def status=['bash','-c', cmd].execute().waitFor()
+    if( status == 0 )
+        error("STOP!! Version $version already deployed!")
 }
 
 protected resolveDeps( String configName, String... x ) {
@@ -422,6 +432,8 @@ task deploy( type: Exec, dependsOn: [clean, compile, pack, deployable.uploadArch
     def files = []
 
     doFirst {
+        checkVersionExits(version)
+        
         def path = new File(releaseDir)
         if( !path.exists() ) error("Releases path does not exists: $path")
         path.eachFile {
diff --git a/modules/nextflow/src/main/groovy/nextflow/Const.groovy b/modules/nextflow/src/main/groovy/nextflow/Const.groovy
index d617755d9e..fd6285bf35 100644
--- a/modules/nextflow/src/main/groovy/nextflow/Const.groovy
+++ b/modules/nextflow/src/main/groovy/nextflow/Const.groovy
@@ -52,17 +52,17 @@ class Const {
     /**
      * The application version
      */
-    static public final String APP_VER = "19.06.0-edge"
+    static public final String APP_VER = "19.07.0-edge"
 
     /**
      * The app build time as linux/unix timestamp
      */
-    static public final long APP_TIMESTAMP = 1561123420338
+    static public final long APP_TIMESTAMP = 1562672809328
 
     /**
      * The app build number
      */
-    static public final int APP_BUILDNUM = 5099
+    static public final int APP_BUILDNUM = 5103
 
 
     /**