diff --git a/c/mlrvers.h b/c/mlrvers.h
index abf896412..c381eaa3f 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 "v5.4.0"
+#define MLR_VERSION "v5.4.0-dev"
 #endif // MLRVERS_H
diff --git a/configure.ac b/configure.ac
index f3b6036f1..ea45f6107 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],[5.4.0])
+AC_INIT([mlr],[5.4.0-dev])
 AC_CONFIG_SRCDIR([c/mlrmain.c])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR([autotools])
diff --git a/doc/manpage.html b/doc/manpage.html
index 047e57f62..2eceb3c17 100644
--- a/doc/manpage.html
+++ b/doc/manpage.html
@@ -212,7 +212,7 @@ DESCRIPTION
        insertion-ordered hash map.  This encompasses a variety of data
        formats, including but not limited to the familiar CSV, TSV, and JSON.
        (Miller can handle positionally-indexed data as a special case.) This
-       manpage documents Miller v5.4.0.
+       manpage documents Miller v5.4.0-dev.
 
 EXAMPLES
    COMMAND-LINE SYNTAX
diff --git a/doc/manpage.txt b/doc/manpage.txt
index 171541efe..0d09b1cd3 100644
--- a/doc/manpage.txt
+++ b/doc/manpage.txt
@@ -18,7 +18,7 @@ DESCRIPTION
        insertion-ordered hash map.  This encompasses a variety of data
        formats, including but not limited to the familiar CSV, TSV, and JSON.
        (Miller can handle positionally-indexed data as a special case.) This
-       manpage documents Miller v5.4.0.
+       manpage documents Miller v5.4.0-dev.
 
 EXAMPLES
    COMMAND-LINE SYNTAX
diff --git a/doc/mlr.1 b/doc/mlr.1
index e8671c54e..1fde02ef4 100644
--- a/doc/mlr.1
+++ b/doc/mlr.1
@@ -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, TSV, and JSON.  (Miller can handle positionally-indexed data as
-a special case.) This manpage documents Miller v5.4.0.
+a special case.) This manpage documents Miller v5.4.0-dev.
 .SH "EXAMPLES"
 .sp
 
diff --git a/doc/reference.html b/doc/reference.html
index 8f47d3f00..c7c68f58f 100644
--- a/doc/reference.html
+++ b/doc/reference.html
@@ -1702,7 +1702,7 @@ Available subcommands:
 For more information, please invoke mlr {subcommand} --help
 
 For more information please see http://johnkerl.org/miller/doc and/or
-http://github.com/johnkerl/miller. This is Miller version v5.4.0.
+http://github.com/johnkerl/miller. This is Miller version v5.4.0-dev.
 </pre>
 </div>
 <p/>