diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
index 2acd9c6c4..2b03eb006 100644
--- a/benchmarks/pom.xml
+++ b/benchmarks/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>benchmarks</artifactId>
diff --git a/bom/pom.xml b/bom/pom.xml
index fb2061cb1..f4a1e2818 100644
--- a/bom/pom.xml
+++ b/bom/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-bom</artifactId>
diff --git a/mockwebserver/pom.xml b/mockwebserver/pom.xml
index d7ccf8fac..92ced6b41 100644
--- a/mockwebserver/pom.xml
+++ b/mockwebserver/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>mockwebserver</artifactId>
diff --git a/okcurl/pom.xml b/okcurl/pom.xml
index b12c259ec..351162433 100644
--- a/okcurl/pom.xml
+++ b/okcurl/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okcurl</artifactId>
diff --git a/okhttp-android-support/pom.xml b/okhttp-android-support/pom.xml
index 120b22219..2b2d2b5e7 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-android-support</artifactId>
diff --git a/okhttp-apache/pom.xml b/okhttp-apache/pom.xml
index 0b38b16c1..4a1179e77 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-apache</artifactId>
diff --git a/okhttp-dnsoverhttps/pom.xml b/okhttp-dnsoverhttps/pom.xml
index 1487d2524..224f43297 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-dnsoverhttps</artifactId>
diff --git a/okhttp-logging-interceptor/pom.xml b/okhttp-logging-interceptor/pom.xml
index f53067987..cff9ce914 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>logging-interceptor</artifactId>
diff --git a/okhttp-sse/pom.xml b/okhttp-sse/pom.xml
index 13c120f05..ba97975db 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-sse</artifactId>
diff --git a/okhttp-testing-support/pom.xml b/okhttp-testing-support/pom.xml
index 8d0082179..19363356c 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-testing-support</artifactId>
diff --git a/okhttp-tests/pom.xml b/okhttp-tests/pom.xml
index 08a7bb481..c25a0516b 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-tests</artifactId>
diff --git a/okhttp-tls/pom.xml b/okhttp-tls/pom.xml
index 68f82999c..8aaacd223 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-tls</artifactId>
diff --git a/okhttp-urlconnection/pom.xml b/okhttp-urlconnection/pom.xml
index edcd04593..86537f25b 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp-urlconnection</artifactId>
diff --git a/okhttp/pom.xml b/okhttp/pom.xml
index f17665282..a16a6c1b2 100644
--- a/okhttp/pom.xml
+++ b/okhttp/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>okhttp</artifactId>
diff --git a/pom.xml b/pom.xml
index 14a31f69a..0adc0cf7e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
   <groupId>com.squareup.okhttp3</groupId>
   <artifactId>parent</artifactId>
-  <version>3.12.0</version>
+  <version>3.13.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>OkHttp (Parent)</name>
@@ -70,7 +70,7 @@
     <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-3.12.0</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <issueManagement>
diff --git a/samples/crawler/pom.xml b/samples/crawler/pom.xml
index e95e453cd..121f52233 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>crawler</artifactId>
diff --git a/samples/guide/pom.xml b/samples/guide/pom.xml
index 565b4c7ba..85f5d36f7 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>guide</artifactId>
diff --git a/samples/pom.xml b/samples/pom.xml
index 4a9f801f2..4cb343bce 100644
--- a/samples/pom.xml
+++ b/samples/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>parent</artifactId>
-    <version>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <groupId>com.squareup.okhttp3.sample</groupId>
diff --git a/samples/simple-client/pom.xml b/samples/simple-client/pom.xml
index e1554b1a7..9b193b203 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>simple-client</artifactId>
diff --git a/samples/slack/pom.xml b/samples/slack/pom.xml
index 44a6e8a5d..ea003abc2 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>slack</artifactId>
diff --git a/samples/static-server/pom.xml b/samples/static-server/pom.xml
index 6ac54f254..058d63f0e 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>static-server</artifactId>
diff --git a/samples/unixdomainsockets/pom.xml b/samples/unixdomainsockets/pom.xml
index f7b6c20aa..0f1c5459f 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>3.12.0</version>
+    <version>3.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>unixdomainsockets</artifactId>