diff --git a/pkgs/picturing-programs/picturing-programs/private/book-pictures.rkt b/pkgs/picturing-programs/picturing-programs/private/book-pictures.rkt
index e5393cc552..4c02ec462b 100644
--- a/pkgs/picturing-programs/picturing-programs/private/book-pictures.rkt
+++ b/pkgs/picturing-programs/picturing-programs/private/book-pictures.rkt
@@ -7,7 +7,7 @@
 
 (provide (prefix-out pic: (all-defined-out)))
 
-(define bloch (bitmap "pictures/bloch.jpg"))
+(define bloch (bitmap "pictures/bloch.png"))
 (define hieroglyphics (bitmap "pictures/small_hieroglyphics.png"))
 (define hacker (bitmap "pictures/mad_hacker.png"))
 (define book (bitmap "pictures/qbook.png"))
diff --git a/pkgs/picturing-programs/picturing-programs/private/pictures/bloch.jpg b/pkgs/picturing-programs/picturing-programs/private/pictures/bloch.jpg
deleted file mode 100644
index 938bebf7c1..0000000000
Binary files a/pkgs/picturing-programs/picturing-programs/private/pictures/bloch.jpg and /dev/null differ
diff --git a/pkgs/picturing-programs/picturing-programs/private/pictures/bloch.png b/pkgs/picturing-programs/picturing-programs/private/pictures/bloch.png
new file mode 100644
index 0000000000..0a1690be11
Binary files /dev/null and b/pkgs/picturing-programs/picturing-programs/private/pictures/bloch.png differ