Prepare for next development iteration
diff --git a/README.md b/README.md
index 5080287..7b10746 100644
--- a/README.md
+++ b/README.md
@@ -139,29 +139,29 @@
 [![Build Status](https://github.com/apache/parquet-mr/workflows/Test/badge.svg)](https://github.com/apache/parquet-mr/actions)
 
 ## Add Parquet as a dependency in Maven
-The current release is version `1.11.0`
+The current release is version `1.12.0`
 
 ```xml
   <dependencies>
     <dependency>
       <groupId>org.apache.parquet</groupId>
       <artifactId>parquet-common</artifactId>
-      <version>1.11.0</version>
+      <version>1.12.0</version>
     </dependency>
     <dependency>
       <groupId>org.apache.parquet</groupId>
       <artifactId>parquet-encoding</artifactId>
-      <version>1.11.0</version>
+      <version>1.12.0</version>
     </dependency>
     <dependency>
       <groupId>org.apache.parquet</groupId>
       <artifactId>parquet-column</artifactId>
-      <version>1.11.0</version>
+      <version>1.12.0</version>
     </dependency>
     <dependency>
       <groupId>org.apache.parquet</groupId>
       <artifactId>parquet-hadoop</artifactId>
-      <version>1.11.0</version>
+      <version>1.12.0</version>
     </dependency>
   </dependencies>
 ```
diff --git a/parquet-arrow/pom.xml b/parquet-arrow/pom.xml
index 40d4797..76e0181 100644
--- a/parquet-arrow/pom.xml
+++ b/parquet-arrow/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-avro/pom.xml b/parquet-avro/pom.xml
index 5845a6f..2679ea0 100644
--- a/parquet-avro/pom.xml
+++ b/parquet-avro/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-benchmarks/pom.xml b/parquet-benchmarks/pom.xml
index 5e33057..1625342 100644
--- a/parquet-benchmarks/pom.xml
+++ b/parquet-benchmarks/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-cascading-deprecated/pom.xml b/parquet-cascading-deprecated/pom.xml
index 7148d02..e96d823 100644
--- a/parquet-cascading-deprecated/pom.xml
+++ b/parquet-cascading-deprecated/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-cascading3-deprecated/pom.xml b/parquet-cascading3-deprecated/pom.xml
index 404be4d..2a09d7b 100644
--- a/parquet-cascading3-deprecated/pom.xml
+++ b/parquet-cascading3-deprecated/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-cli/pom.xml b/parquet-cli/pom.xml
index 6f1c6d9..db240b0 100644
--- a/parquet-cli/pom.xml
+++ b/parquet-cli/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-column/pom.xml b/parquet-column/pom.xml
index 44fc1a2..a80fe0b 100644
--- a/parquet-column/pom.xml
+++ b/parquet-column/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-common/pom.xml b/parquet-common/pom.xml
index 7fa4cab..c090fcb 100644
--- a/parquet-common/pom.xml
+++ b/parquet-common/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-encoding/pom.xml b/parquet-encoding/pom.xml
index 6078d7c..e5485ca 100644
--- a/parquet-encoding/pom.xml
+++ b/parquet-encoding/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-format-structures/pom.xml b/parquet-format-structures/pom.xml
index c53d82d..b0b384f 100644
--- a/parquet-format-structures/pom.xml
+++ b/parquet-format-structures/pom.xml
@@ -24,7 +24,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>parquet-format-structures</artifactId>
diff --git a/parquet-generator/pom.xml b/parquet-generator/pom.xml
index 0f3ccaa..a39370d 100644
--- a/parquet-generator/pom.xml
+++ b/parquet-generator/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-hadoop-bundle/pom.xml b/parquet-hadoop-bundle/pom.xml
index bbddc95..2aae6e5 100644
--- a/parquet-hadoop-bundle/pom.xml
+++ b/parquet-hadoop-bundle/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-hadoop/pom.xml b/parquet-hadoop/pom.xml
index 03ec9cb..554f125 100644
--- a/parquet-hadoop/pom.xml
+++ b/parquet-hadoop/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-jackson/pom.xml b/parquet-jackson/pom.xml
index 3e8e209..1aa6fe2 100644
--- a/parquet-jackson/pom.xml
+++ b/parquet-jackson/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-pig-bundle/pom.xml b/parquet-pig-bundle/pom.xml
index e12753b..e9fa806 100644
--- a/parquet-pig-bundle/pom.xml
+++ b/parquet-pig-bundle/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-pig/pom.xml b/parquet-pig/pom.xml
index a8ab606..eaf4e15 100644
--- a/parquet-pig/pom.xml
+++ b/parquet-pig/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-protobuf/pom.xml b/parquet-protobuf/pom.xml
index 93bfb5b..01af743 100644
--- a/parquet-protobuf/pom.xml
+++ b/parquet-protobuf/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-scala/pom.xml b/parquet-scala/pom.xml
index 0431317..e33d6f4 100644
--- a/parquet-scala/pom.xml
+++ b/parquet-scala/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-scrooge-deprecated/pom.xml b/parquet-scrooge-deprecated/pom.xml
index 0ee7da8..a6d6afb 100644
--- a/parquet-scrooge-deprecated/pom.xml
+++ b/parquet-scrooge-deprecated/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-thrift/pom.xml b/parquet-thrift/pom.xml
index 9e09c1b..07020de 100644
--- a/parquet-thrift/pom.xml
+++ b/parquet-thrift/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/parquet-tools-deprecated/pom.xml b/parquet-tools-deprecated/pom.xml
index 81007e9..dd26abb 100644
--- a/parquet-tools-deprecated/pom.xml
+++ b/parquet-tools-deprecated/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.parquet</groupId>
     <artifactId>parquet</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>1.12.0-SNAPSHOT</version>
+    <version>1.13.0-SNAPSHOT</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/pom.xml b/pom.xml
index 4968846..a005873 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
 
   <groupId>org.apache.parquet</groupId>
   <artifactId>parquet</artifactId>
-  <version>1.12.0-SNAPSHOT</version>
+  <version>1.13.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Apache Parquet MR</name>
@@ -83,7 +83,7 @@
     <cascading.version>2.7.1</cascading.version>
     <cascading3.version>3.1.2</cascading3.version>
     <parquet.format.version>2.8.0</parquet.format.version>
-    <previous.version>1.11.0</previous.version>
+    <previous.version>1.12.0</previous.version>
     <thrift.executable>thrift</thrift.executable>
     <format.thrift.executable>thrift</format.thrift.executable>
     <scala.version>2.12.8</scala.version>