1 files changed, 1 insertions, 1 deletions
diff --git a/ext/util.c b/ext/util.c
index 42fe8ac..7e59abc 100644
--- a/ext/util.c
+++ b/ext/util.c
@@ -9,7 +9,7 @@
 
 int bin2hex(char *hex, size_t hexsize, const uint8_t *bin, size_t binlen)
 {
-    static const char hex_chars[] = "0123456789ABCDEF";
+    static const char hex_chars[] = "0123456789abcdef";
 
     if (hex == NULL || bin == NULL || hexsize == 0)
         return -1;