diff --git a/spyder_line_profiler/__init__.py b/spyder_line_profiler/__init__.py
index 8efcbfe..ecb4b61 100644
--- a/spyder_line_profiler/__init__.py
+++ b/spyder_line_profiler/__init__.py
@@ -11,4 +11,4 @@
 Spyder Line Profiler.
 """
 
-__version__ = "0.4.0"
+__version__ = "0.4.1.dev0"