diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index c15cb0e22..7b06c6ab5 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,26 +1,7 @@
 ## Validator Changes
 
-* Support authentication for terminology servers (see https://confluence.hl7.org/display/FHIR/Using+fhir-settings.json)
-* Fix issue where valdiator not retaining extension context when checking constraint expressions in profiles
-* Validate min-length when found in extension
-* Correct bug parsing json-property-key values with meant validation failed
-* Fix problem validating json-property-key value pairs
-* Fix special case r5 loading of terminology to fix validation error on ExampleScenario
-* Improve handling of JSON format errors
-* Fix bug where extension slices defined in other profiles are not found when processing slices based on extension
-* Validate fhirpath expression in slice discriminators
-* Fix slicing by type and profile to allow multiple options per slice
-* List measure choices when a match by version can't be found
-* Check server metadata when executing terminology test cases
+* no changes
 
 ## Other code changes
 
-* More work on code generation for profiles
-* Render min-length extension on profiles
-* Clone SQL on FHIR engine to R4, and update FHIRPath engine based on R5 current code
-* Update SQL on FHIR engine to allow push as well as pull
-* Change R5 tx server to use http://tx.fhir.org/r5 (instead of /r4)
-* Update output from tx-tester to include release ready statement
-* Fix rendering of Logical Models for polymorphic elements, and rendering target profiles with versions
-* Render contained resources in List resource
-* #1790 - Fix versionFromCanonical returns system instead and systemFromCanonical returns version
+* no changes
\ No newline at end of file
diff --git a/org.hl7.fhir.convertors/pom.xml b/org.hl7.fhir.convertors/pom.xml
index f0a4ab1ef..c0ec3f890 100644
--- a/org.hl7.fhir.convertors/pom.xml
+++ b/org.hl7.fhir.convertors/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.4.1</version>
+        <version>6.4.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/org.hl7.fhir.dstu2/pom.xml b/org.hl7.fhir.dstu2/pom.xml
index ff43f7057..7d13c552e 100644
--- a/org.hl7.fhir.dstu2/pom.xml
+++ b/org.hl7.fhir.dstu2/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.4.1</version>
+		<version>6.4.2-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/org.hl7.fhir.dstu2016may/pom.xml b/org.hl7.fhir.dstu2016may/pom.xml
index aafd34206..b6f329a0c 100644
--- a/org.hl7.fhir.dstu2016may/pom.xml
+++ b/org.hl7.fhir.dstu2016may/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.4.1</version>
+		<version>6.4.2-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/org.hl7.fhir.dstu3/pom.xml b/org.hl7.fhir.dstu3/pom.xml
index 452db20fa..c23be2334 100644
--- a/org.hl7.fhir.dstu3/pom.xml
+++ b/org.hl7.fhir.dstu3/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.4.1</version>
+        <version>6.4.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/org.hl7.fhir.r4/pom.xml b/org.hl7.fhir.r4/pom.xml
index c3964ccfc..95f120476 100644
--- a/org.hl7.fhir.r4/pom.xml
+++ b/org.hl7.fhir.r4/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.4.1</version>
+		<version>6.4.2-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/org.hl7.fhir.r4b/pom.xml b/org.hl7.fhir.r4b/pom.xml
index 54c517b19..5e9ce3dd3 100644
--- a/org.hl7.fhir.r4b/pom.xml
+++ b/org.hl7.fhir.r4b/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.4.1</version>
+		<version>6.4.2-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/org.hl7.fhir.r5/pom.xml b/org.hl7.fhir.r5/pom.xml
index c0e20e41e..9e1e21c67 100644
--- a/org.hl7.fhir.r5/pom.xml
+++ b/org.hl7.fhir.r5/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.4.1</version>
+		<version>6.4.2-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/org.hl7.fhir.report/pom.xml b/org.hl7.fhir.report/pom.xml
index a04f7443d..e7d848df7 100644
--- a/org.hl7.fhir.report/pom.xml
+++ b/org.hl7.fhir.report/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.4.1</version>
+        <version>6.4.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/org.hl7.fhir.utilities/pom.xml b/org.hl7.fhir.utilities/pom.xml
index 00d81a81a..09b26fb2c 100644
--- a/org.hl7.fhir.utilities/pom.xml
+++ b/org.hl7.fhir.utilities/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.4.1</version>
+        <version>6.4.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/org.hl7.fhir.validation.cli/pom.xml b/org.hl7.fhir.validation.cli/pom.xml
index 9c9478d3b..44944b33a 100644
--- a/org.hl7.fhir.validation.cli/pom.xml
+++ b/org.hl7.fhir.validation.cli/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.4.1</version>
+        <version>6.4.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/org.hl7.fhir.validation/pom.xml b/org.hl7.fhir.validation/pom.xml
index a1509d71c..a70791f82 100644
--- a/org.hl7.fhir.validation/pom.xml
+++ b/org.hl7.fhir.validation/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.4.1</version>
+        <version>6.4.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index a91f88509..fab7b90b1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
     HAPI FHIR
     -->
     <artifactId>org.hl7.fhir.core</artifactId>
-    <version>6.4.1</version>
+    <version>6.4.2-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <properties>