diff --git a/print_image.sh b/print_image.sh
index 5d0e09a..c58c337 100755
--- a/print_image.sh
+++ b/print_image.sh
@@ -15,9 +15,12 @@ size="$(hex_size "$(("$size" + 10))")"
 size_x="$(hex_size "$(echo "$data_header" | cut -d' ' -f 1)")"
 size_y="$(hex_size "$(echo "$data_header" | cut -d' ' -f 2)")"
 
+# Initialize printer
+printf '\x1B@' > $dev
+
 # Set print speed
 printf '\x1D(K\2\0' > $dev
-printf '21' > $dev
+printf '22' > $dev
 
 # Upload graphics data
 printf '\x1D(L' > $dev