diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 00000000..f0facf52
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,2 @@
+include LICENSE
+include requirements/*
diff --git a/marl_eval/_metadata.py b/marl_eval/_metadata.py
index 2fae637d..5523e251 100644
--- a/marl_eval/_metadata.py
+++ b/marl_eval/_metadata.py
@@ -22,7 +22,7 @@
 # We follow Semantic Versioning (https://semver.org/)
 _MAJOR_VERSION = "0"
 _MINOR_VERSION = "0"
-_PATCH_VERSION = "3"
+_PATCH_VERSION = "4"
 
 # Example: '0.4.2'
 __version__ = ".".join([_MAJOR_VERSION, _MINOR_VERSION, _PATCH_VERSION])