diff --git a/configure.ac b/configure.ac
index 7b1f4423..0f2ff217 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([rofi], [1.5.1], [https://github.com/DaveDavenport/rofi/],[],[https://reddit.com/r/qtools/])
+AC_INIT([rofi], [1.5.1-dev], [https://github.com/DaveDavenport/rofi/],[],[https://reddit.com/r/qtools/])
 
 AC_CONFIG_SRCDIR([source/rofi.c])
 AC_CONFIG_HEADER([config.h])
diff --git a/meson.build b/meson.build
index e897a796..f9689b72 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('rofi', 'c',
-    version: '1.5.1',
+    version: '1.5.1-dev',
     meson_version: '>=0.39.1',
     license: [ 'MIT' ],
     default_options: [