diff --git a/Makefile b/Makefile
index e177859..f16f95e 100755
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,14 @@
 #
 # Kitsune Scientific 2021
 
-all: generate
+hash := $(shell git rev-parse --short HEAD)
 
-generate: *.md
-	pandoc *.md -t beamer -o changeme.pdf
+all: generate clean
+
+generate: example_slides.md
+	cp example_slides.md working.md
+	sed -i "s/&hash/$(hash)/" working.md
+	pandoc working.md -t beamer -o changeme.pdf
+
+clean: working.md
+	rm working.md
diff --git a/example_slides.md b/example_slides.md
index 20f22d5..b728957 100644
--- a/example_slides.md
+++ b/example_slides.md
@@ -2,7 +2,7 @@
 title:
  - Using pandoc, latex + beamer and markdown to VCS a slideshow
 subtitle:
- - Subtle
+ - Version &hash
 author:
  - KenwoodFox
 institute: