diff --git a/Makefile b/Makefile
index d0c3cbf..1cc691e 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,11 @@ BUILDDIR      = build
 help:
 	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
-.PHONY: help Makefile
+# Custom (by me Loïc Guégan)
+watch:
+	find ./source -type f | entr make html
+
+.PHONY: help Makefile watch
 
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).