diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
index f919e09b207..85a55e4b776 100644
--- a/benchmarks/pom.xml
+++ b/benchmarks/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>benchmarks</artifactId>
diff --git a/pom.xml b/pom.xml
index 944eba88da1..62e02357b5f 100755
--- a/pom.xml
+++ b/pom.xml
@@ -19,7 +19,7 @@
 
   <groupId>io.zipkin.zipkin2</groupId>
   <artifactId>parent</artifactId>
-  <version>2.12.3</version>
+  <version>2.12.4-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <modules>
@@ -115,7 +115,7 @@
     <url>https://github.com/openzipkin/zipkin</url>
     <connection>scm:git:https://github.com/openzipkin/zipkin.git</connection>
     <developerConnection>scm:git:https://github.com/openzipkin/zipkin.git</developerConnection>
-    <tag>2.12.3</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <!-- Developer section is needed for Maven Central, but doesn't need to include each person -->
diff --git a/zipkin-autoconfigure/collector-kafka/pom.xml b/zipkin-autoconfigure/collector-kafka/pom.xml
index c0b98559487..93797261f6d 100644
--- a/zipkin-autoconfigure/collector-kafka/pom.xml
+++ b/zipkin-autoconfigure/collector-kafka/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-collector-kafka</artifactId>
diff --git a/zipkin-autoconfigure/collector-kafka08/pom.xml b/zipkin-autoconfigure/collector-kafka08/pom.xml
index 2ef633adcb1..3cd679c0375 100644
--- a/zipkin-autoconfigure/collector-kafka08/pom.xml
+++ b/zipkin-autoconfigure/collector-kafka08/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-collector-kafka08</artifactId>
diff --git a/zipkin-autoconfigure/collector-rabbitmq/pom.xml b/zipkin-autoconfigure/collector-rabbitmq/pom.xml
index 72e08603969..191ad73df0f 100644
--- a/zipkin-autoconfigure/collector-rabbitmq/pom.xml
+++ b/zipkin-autoconfigure/collector-rabbitmq/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-collector-rabbitmq</artifactId>
diff --git a/zipkin-autoconfigure/collector-scribe/pom.xml b/zipkin-autoconfigure/collector-scribe/pom.xml
index 7e1bb0cf9fc..baee4aa92a4 100644
--- a/zipkin-autoconfigure/collector-scribe/pom.xml
+++ b/zipkin-autoconfigure/collector-scribe/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-collector-scribe</artifactId>
diff --git a/zipkin-autoconfigure/metrics-prometheus/pom.xml b/zipkin-autoconfigure/metrics-prometheus/pom.xml
index 6d8ead52dfb..42524f432c8 100644
--- a/zipkin-autoconfigure/metrics-prometheus/pom.xml
+++ b/zipkin-autoconfigure/metrics-prometheus/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <artifactId>zipkin-autoconfigure</artifactId>
     <groupId>io.zipkin.java</groupId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/zipkin-autoconfigure/pom.xml b/zipkin-autoconfigure/pom.xml
index a3f1508fc68..4bd99f7ab1e 100644
--- a/zipkin-autoconfigure/pom.xml
+++ b/zipkin-autoconfigure/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <!-- TODO: group ID change: https://github.com/openzipkin/zipkin/issues/2132 -->
diff --git a/zipkin-autoconfigure/storage-cassandra/pom.xml b/zipkin-autoconfigure/storage-cassandra/pom.xml
index 3f67c6844d9..31667e3bfca 100644
--- a/zipkin-autoconfigure/storage-cassandra/pom.xml
+++ b/zipkin-autoconfigure/storage-cassandra/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-storage-cassandra</artifactId>
diff --git a/zipkin-autoconfigure/storage-cassandra3/pom.xml b/zipkin-autoconfigure/storage-cassandra3/pom.xml
index cb62d0a5f69..9dc283d0863 100644
--- a/zipkin-autoconfigure/storage-cassandra3/pom.xml
+++ b/zipkin-autoconfigure/storage-cassandra3/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-storage-cassandra3</artifactId>
diff --git a/zipkin-autoconfigure/storage-elasticsearch/pom.xml b/zipkin-autoconfigure/storage-elasticsearch/pom.xml
index c6fb7af9d26..70c3fa8eafc 100644
--- a/zipkin-autoconfigure/storage-elasticsearch/pom.xml
+++ b/zipkin-autoconfigure/storage-elasticsearch/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-storage-elasticsearch</artifactId>
diff --git a/zipkin-autoconfigure/storage-mysql/pom.xml b/zipkin-autoconfigure/storage-mysql/pom.xml
index a4341a1e043..5b724f1c56f 100644
--- a/zipkin-autoconfigure/storage-mysql/pom.xml
+++ b/zipkin-autoconfigure/storage-mysql/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-storage-mysql</artifactId>
diff --git a/zipkin-autoconfigure/ui/pom.xml b/zipkin-autoconfigure/ui/pom.xml
index 28df2f87f33..c5499588a74 100644
--- a/zipkin-autoconfigure/ui/pom.xml
+++ b/zipkin-autoconfigure/ui/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.java</groupId>
     <artifactId>zipkin-autoconfigure</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-autoconfigure-ui</artifactId>
diff --git a/zipkin-collector/core/pom.xml b/zipkin-collector/core/pom.xml
index 2d94867f515..0feb0fb8947 100644
--- a/zipkin-collector/core/pom.xml
+++ b/zipkin-collector/core/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-collector-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-collector</artifactId>
diff --git a/zipkin-collector/kafka/pom.xml b/zipkin-collector/kafka/pom.xml
index e5b2e32939b..8bc53d5eb6f 100644
--- a/zipkin-collector/kafka/pom.xml
+++ b/zipkin-collector/kafka/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-collector-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-collector-kafka</artifactId>
diff --git a/zipkin-collector/kafka08/pom.xml b/zipkin-collector/kafka08/pom.xml
index 469673c6964..f6879b50f8b 100644
--- a/zipkin-collector/kafka08/pom.xml
+++ b/zipkin-collector/kafka08/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-collector-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-collector-kafka08</artifactId>
diff --git a/zipkin-collector/pom.xml b/zipkin-collector/pom.xml
index 0667f68d914..787adeecb1d 100644
--- a/zipkin-collector/pom.xml
+++ b/zipkin-collector/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-collector-parent</artifactId>
diff --git a/zipkin-collector/rabbitmq/pom.xml b/zipkin-collector/rabbitmq/pom.xml
index 4df50ed9d41..0e78f38fecc 100644
--- a/zipkin-collector/rabbitmq/pom.xml
+++ b/zipkin-collector/rabbitmq/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-collector-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-collector-rabbitmq</artifactId>
diff --git a/zipkin-collector/scribe/pom.xml b/zipkin-collector/scribe/pom.xml
index 4279482ca6a..6062c519c25 100644
--- a/zipkin-collector/scribe/pom.xml
+++ b/zipkin-collector/scribe/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-collector-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-collector-scribe</artifactId>
diff --git a/zipkin-junit/pom.xml b/zipkin-junit/pom.xml
index 64256fa706a..766fb86efb9 100644
--- a/zipkin-junit/pom.xml
+++ b/zipkin-junit/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-junit</artifactId>
diff --git a/zipkin-lens/pom.xml b/zipkin-lens/pom.xml
index 0c5d6d6d914..a87a34455f0 100644
--- a/zipkin-lens/pom.xml
+++ b/zipkin-lens/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-lens</artifactId>
diff --git a/zipkin-server/pom.xml b/zipkin-server/pom.xml
index 3ca3bfa3b9b..fc9d56a8f1a 100644
--- a/zipkin-server/pom.xml
+++ b/zipkin-server/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <!-- TODO: group ID change: https://github.com/openzipkin/zipkin/issues/2132 -->
diff --git a/zipkin-storage/cassandra-v1/pom.xml b/zipkin-storage/cassandra-v1/pom.xml
index bad0046d1c4..7c9c458bd82 100644
--- a/zipkin-storage/cassandra-v1/pom.xml
+++ b/zipkin-storage/cassandra-v1/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-storage-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-storage-cassandra-v1</artifactId>
diff --git a/zipkin-storage/cassandra/pom.xml b/zipkin-storage/cassandra/pom.xml
index fad1d181406..4e7da201c73 100644
--- a/zipkin-storage/cassandra/pom.xml
+++ b/zipkin-storage/cassandra/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-storage-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-storage-cassandra</artifactId>
diff --git a/zipkin-storage/elasticsearch/pom.xml b/zipkin-storage/elasticsearch/pom.xml
index afee0dfa9bf..3b4ed07f1f4 100644
--- a/zipkin-storage/elasticsearch/pom.xml
+++ b/zipkin-storage/elasticsearch/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-storage-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-storage-elasticsearch</artifactId>
diff --git a/zipkin-storage/mysql-v1/pom.xml b/zipkin-storage/mysql-v1/pom.xml
index 9fda45ccc8c..d28cc108163 100644
--- a/zipkin-storage/mysql-v1/pom.xml
+++ b/zipkin-storage/mysql-v1/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>zipkin-storage-parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-storage-mysql-v1</artifactId>
diff --git a/zipkin-storage/pom.xml b/zipkin-storage/pom.xml
index 097a84f7a42..8a8ee83adc9 100644
--- a/zipkin-storage/pom.xml
+++ b/zipkin-storage/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin-storage-parent</artifactId>
diff --git a/zipkin-ui/pom.xml b/zipkin-ui/pom.xml
index 09be13b85e1..8b5586b31ba 100644
--- a/zipkin-ui/pom.xml
+++ b/zipkin-ui/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <!-- TODO: group ID change: https://github.com/openzipkin/zipkin/issues/2132 -->
diff --git a/zipkin/pom.xml b/zipkin/pom.xml
index 5d264ff2dda..8d787640004 100644
--- a/zipkin/pom.xml
+++ b/zipkin/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.zipkin.zipkin2</groupId>
     <artifactId>parent</artifactId>
-    <version>2.12.3</version>
+    <version>2.12.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>zipkin</artifactId>