diff --git a/c/mlrvers.h b/c/mlrvers.h
index 0f8baf927..40249a655 100644
--- a/c/mlrvers.h
+++ b/c/mlrvers.h
@@ -1,5 +1,5 @@
 #ifndef MLRVERS_H
 #define MLRVERS_H
 // Manually increment on updates to https://github.com/johnkerl/miller/releases
-#define MLR_VERSION "v4.2.0"
+#define MLR_VERSION "v4.2.0-dev"
 #endif // MLRVERS_H
diff --git a/configure.ac b/configure.ac
index 1670563f0..47295ffec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 AC_PREREQ([2.60])
 # Manually increment on updates to https://github.com/johnkerl/miller/releases
-AC_INIT([mlr],[4.2.0])
+AC_INIT([mlr],[4.2.0-dev])
 AC_CONFIG_SRCDIR([c/mlrmain.c])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR([autotools])
diff --git a/doc/mlr.1 b/doc/mlr.1
index b5e8483da..3c4dc3d36 100644
--- a/doc/mlr.1
+++ b/doc/mlr.1
@@ -2,12 +2,12 @@
 .\"     Title: mlr
 .\"    Author: [see the "AUTHOR" section]
 .\" Generator: ./mkman.rb
-.\"      Date: 2016-06-20
+.\"      Date: 2016-06-21
 .\"    Manual: \ \&
 .\"    Source: \ \&
 .\"  Language: English
 .\"
-.TH "MILLER" "1" "2016-06-20" "\ \&" "\ \&"
+.TH "MILLER" "1" "2016-06-21" "\ \&" "\ \&"
 .\" -----------------------------------------------------------------
 .\" * Portability definitions
 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -38,7 +38,7 @@ on integer-indexed fields: if the natural data structure for the latter is the
 array, then Miller's natural data structure is the insertion-ordered hash map.
 This encompasses a variety of data formats, including but not limited to the
 familiar CSV and JSON.  (Miller can handle positionally-indexed data as a special
-case.) This manpage documents Miller v4.2.0.
+case.) This manpage documents Miller v4.2.0-dev.
 .SH "EXAMPLES"
 .sp
 
diff --git a/doc/reference.html b/doc/reference.html
index 0471fa7bc..05e2dc4b5 100644
--- a/doc/reference.html
+++ b/doc/reference.html
@@ -545,7 +545,7 @@ Output of one verb may be chained as input to another using "then", e.g.
   mlr stats1 -a min,mean,max -f flag,u,v -g color then sort -f color
 
 For more information please see http://johnkerl.org/miller/doc and/or
-http://github.com/johnkerl/miller. This is Miller version v4.2.0.
+http://github.com/johnkerl/miller. This is Miller version v4.2.0-dev.
 </pre>
 </div>
 <p/>