diff --git a/img/.gitignore b/img/.gitignore
index 2f8b1c3..22ea055 100644
--- a/img/.gitignore
+++ b/img/.gitignore
@@ -5,3 +5,4 @@ mainBgPattern.png
 polyMap.png
 /desc*.jpg
 legoEducation.png
+polytechInstrumentation.png
diff --git a/img/Makefile b/img/Makefile
index 585364d..c9e91b4 100755
--- a/img/Makefile
+++ b/img/Makefile
@@ -31,8 +31,9 @@ legoEducation.png:
 	convert $@ -resize x200 $@
 	optipng -o7 $@
 
-polytechInstrumentation2.png: polytechInstrumentation.svg
+polytechInstrumentation.png: polytechInstrumentation.svg
 	convert -background none $< $@
+	optipng -o7 $@
 
 # DESCRIPTION
 descDescriptif.jpg: orig/descDescriptif.jpg
diff --git a/img/polytechInstrumentation.png b/img/polytechInstrumentation.png
deleted file mode 100644
index d444790..0000000
Binary files a/img/polytechInstrumentation.png and /dev/null differ
--
libgit2 0.21.2