diff --git a/manuscrit/00_opening/05_version.tex b/manuscrit/00_opening/05_version.tex
new file mode 100644
index 0000000..3ab55c2
--- /dev/null
+++ b/manuscrit/00_opening/05_version.tex
@@ -0,0 +1,7 @@
+%\input{../build/version}
+\vspace*{\fill}
+\begin{center}
+    Version \texttt{\input{../build/version}}
+\end{center}
+\vspace*{\fill}
+\newpage{}
diff --git a/manuscrit/00_opening/main.tex b/manuscrit/00_opening/main.tex
index f1b839f..c9733e6 100644
--- a/manuscrit/00_opening/main.tex
+++ b/manuscrit/00_opening/main.tex
@@ -1,3 +1,5 @@
+\input{05_version.tex}
+
 \input{10_abstract.tex}
 
 \setcounter{page}{4}
diff --git a/manuscrit/Makefile b/manuscrit/Makefile
index 42e8869..474803d 100644
--- a/manuscrit/Makefile
+++ b/manuscrit/Makefile
@@ -4,6 +4,7 @@ AUX_DIR=$(BUILD_DIR)/aux
 CLEANED_PDF=$(BUILD_DIR)/these.pdf
 MAIN_PDF=$(BUILD_DIR)/main.pdf
 ALL=$(CLEANED_PDF)
+REV_FILE=$(BUILD_DIR)/version
 
 all: _setup $(ALL)
 
@@ -16,19 +17,27 @@ _setup:
 
 $(CLEANED_PDF): $(MAIN_PDF)
 	qpdf "$<" --linearize "$@"
-	exiftool -all:all= "$@"
+	exiftool -all:all= \
+		-Version="$(shell bin/version.sh)" \
+		-Author="Théophile Bastian" \
+		-Title="Performance study: identifying bottlenecks by means of sensitivity analysis" \
+		"$@"
 	@ pdffonts "$@" | grep -q '   no' && echo -e "\033[0;1;31mSOME FONTS NOT EMBEDDED\033[0m" || true
 	@ !(pdffonts "$@" | grep -q '   no')
 
 
 .PHONY: $(MAIN_PDF)  # hack-ish: latexmk knows better when to run.
-$(MAIN_PDF): assets
+$(MAIN_PDF): assets $(REV_FILE)
 	latexmk $($(notdir $@):.pdf=.tex)
 
 .PHONY: assets
 assets:
 	$(MAKE) -C "$@"
 
+.PHONY: $(REV_FILE)  # not costly: just always run it.
+$(REV_FILE):
+	./bin/version.sh > "$@"
+
 clean:
 	latexmk -C
 
diff --git a/manuscrit/bin/version.sh b/manuscrit/bin/version.sh
new file mode 100755
index 0000000..1ebc70a
--- /dev/null
+++ b/manuscrit/bin/version.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+echo -n "$(git rev-parse --short HEAD)"
+if [ -n "$(git status --porcelain --untracked-files=no)" ] ; then
+    echo -n "-dirty"
+fi
+echo ""