diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
index 5a7164f6e..1ede888fe 100644
--- a/benchmarks/pom.xml
+++ b/benchmarks/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>benchmarks</artifactId>
diff --git a/mockwebserver/pom.xml b/mockwebserver/pom.xml
index 7918a334c..eb1900757 100644
--- a/mockwebserver/pom.xml
+++ b/mockwebserver/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>mockwebserver</artifactId>
diff --git a/okcurl/pom.xml b/okcurl/pom.xml
index 75aa54302..6d1cc5c69 100644
--- a/okcurl/pom.xml
+++ b/okcurl/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okcurl</artifactId>
diff --git a/okhttp-android-support/pom.xml b/okhttp-android-support/pom.xml
index 63171bb1b..ecb19d47a 100644
--- a/okhttp-android-support/pom.xml
+++ b/okhttp-android-support/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-android-support</artifactId>
diff --git a/okhttp-apache/pom.xml b/okhttp-apache/pom.xml
index aede90a3a..85c666ba9 100644
--- a/okhttp-apache/pom.xml
+++ b/okhttp-apache/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-apache</artifactId>
diff --git a/okhttp-dnsoverhttps/pom.xml b/okhttp-dnsoverhttps/pom.xml
index 9e59b9329..2fb9c3db1 100644
--- a/okhttp-dnsoverhttps/pom.xml
+++ b/okhttp-dnsoverhttps/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-dnsoverhttps</artifactId>
diff --git a/okhttp-logging-interceptor/pom.xml b/okhttp-logging-interceptor/pom.xml
index fd71fa933..0e35c12c7 100644
--- a/okhttp-logging-interceptor/pom.xml
+++ b/okhttp-logging-interceptor/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>logging-interceptor</artifactId>
diff --git a/okhttp-sse/pom.xml b/okhttp-sse/pom.xml
index 5bbcace00..b46d96f09 100644
--- a/okhttp-sse/pom.xml
+++ b/okhttp-sse/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-sse</artifactId>
diff --git a/okhttp-testing-support/pom.xml b/okhttp-testing-support/pom.xml
index ef8f196c9..e8cb9aee5 100644
--- a/okhttp-testing-support/pom.xml
+++ b/okhttp-testing-support/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-testing-support</artifactId>
diff --git a/okhttp-tests/pom.xml b/okhttp-tests/pom.xml
index 1a66f9105..024714f31 100644
--- a/okhttp-tests/pom.xml
+++ b/okhttp-tests/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-tests</artifactId>
diff --git a/okhttp-tls/pom.xml b/okhttp-tls/pom.xml
index b45ac790c..3b40e6e71 100644
--- a/okhttp-tls/pom.xml
+++ b/okhttp-tls/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-tls</artifactId>
diff --git a/okhttp-urlconnection/pom.xml b/okhttp-urlconnection/pom.xml
index f60ee5d8d..249a90de0 100644
--- a/okhttp-urlconnection/pom.xml
+++ b/okhttp-urlconnection/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-urlconnection</artifactId>
diff --git a/okhttp/pom.xml b/okhttp/pom.xml
index 05d9b0a93..0bd07c596 100644
--- a/okhttp/pom.xml
+++ b/okhttp/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp</artifactId>
diff --git a/pom.xml b/pom.xml
index 956fb3b52..aef7b4a52 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
   <groupId>com.squareup.okhttp3</groupId>
   <artifactId>parent</artifactId>
-  <version>3.11.0</version>
+  <version>3.12.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>OkHttp (Parent)</name>
@@ -69,7 +69,7 @@
     <url>https://github.com/square/okhttp/</url>
     <connection>scm:git:https://github.com/square/okhttp.git</connection>
     <developerConnection>scm:git:git@github.com:square/okhttp.git</developerConnection>
-    <tag>parent-3.11.0</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <issueManagement>
diff --git a/samples/crawler/pom.xml b/samples/crawler/pom.xml
index d949efb31..97bcf040f 100644
--- a/samples/crawler/pom.xml
+++ b/samples/crawler/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3.sample</groupId>
     <artifactId>sample-parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>crawler</artifactId>
diff --git a/samples/guide/pom.xml b/samples/guide/pom.xml
index 000794d57..9b50423b4 100644
--- a/samples/guide/pom.xml
+++ b/samples/guide/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3.sample</groupId>
     <artifactId>sample-parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>guide</artifactId>
diff --git a/samples/pom.xml b/samples/pom.xml
index 2b8a348db..f767a9377 100644
--- a/samples/pom.xml
+++ b/samples/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <groupId>com.squareup.okhttp3.sample</groupId>
diff --git a/samples/simple-client/pom.xml b/samples/simple-client/pom.xml
index f7b96cbbe..d4f3ec0ae 100644
--- a/samples/simple-client/pom.xml
+++ b/samples/simple-client/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3.sample</groupId>
     <artifactId>sample-parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>simple-client</artifactId>
diff --git a/samples/slack/pom.xml b/samples/slack/pom.xml
index 9ac23202c..26798cddf 100644
--- a/samples/slack/pom.xml
+++ b/samples/slack/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3.sample</groupId>
     <artifactId>sample-parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>slack</artifactId>
diff --git a/samples/static-server/pom.xml b/samples/static-server/pom.xml
index 792de298f..5c949eeb5 100644
--- a/samples/static-server/pom.xml
+++ b/samples/static-server/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3.sample</groupId>
     <artifactId>sample-parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>static-server</artifactId>
diff --git a/samples/unixdomainsockets/pom.xml b/samples/unixdomainsockets/pom.xml
index 47759598e..a9ea69192 100644
--- a/samples/unixdomainsockets/pom.xml
+++ b/samples/unixdomainsockets/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3.sample</groupId>
     <artifactId>sample-parent</artifactId>
-    <version>3.11.0</version>
+    <version>3.12.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>unixdomainsockets</artifactId>