diff --git a/bin/compose b/bin/compose
index c18e3f9..84486f6 100755
--- a/bin/compose
+++ b/bin/compose
@@ -257,13 +257,14 @@ str_matches() {
 }
 
 gen_password() {
-    python -c 'import random; \
-        xx = "azertyuiopqsdfghjklmwxcvbn1234567890AZERTYUIOPQSDFGHJKLMWXCVBN+_-"; \
-        print "".join([xx[random.randint(0, len(xx)-1)] for x in range(0, 14)])'
+    local l=( {a..z} {A..Z} {0..9} ) nl="${#l[@]}" size=${1:-16}
+    while ((size--)); do
+        echo -n "${l[$((RANDOM * nl / 32768))]}"
+    done
+    echo
 }
 export -f gen_password
 
-
 file_put() {
     local TARGET="$1"
     mkdir -p "$(dirname "$TARGET")" &&