diff --git a/README.md b/README.md
index cecb940..f9e6ef0 100644
--- a/README.md
+++ b/README.md
@@ -74,9 +74,9 @@ curl --location 'http://localhost:8000/v1/decode' \
 
 The ChaCha20-Poly1305 works with a 32-byte secret key. When you use a secret key with less than 32 bytes, we need to use left padding until the required size is reached.
 
-The default character for the left padding is the white space, which can be changed using the "secure_qrcode_left_padding_char" environment variable.
+The default character for the left padding is the white space, which can be changed using the `"secure_qrcode_left_padding_char"` environment variable.
 
-For example, when using the secret key "my super secret key" the value used in the encryption function will be "my super secret key             ".
+For example, when using the secret key `"my super secret key"` the value used in the encryption function will be `"my super secret key             "`.
 
 To start the server using another left padding char: