diff --git a/shellpki b/shellpki
index f1b4b1f..e3d66f5 100755
--- a/shellpki
+++ b/shellpki
@@ -65,7 +65,7 @@ List all certificates :
     ${0} list <options>
 
     Options
-        -a, --all                   list all certificates : valid and revoked ones
+        -a, --all                   list all certificates: valid and revoked ones
         -v, --valid                 list all valid certificates
         -r, --revoked               list all revoked certificates
 
@@ -797,7 +797,7 @@ revoke() {
     crt_file="${CRT_DIR}/${cn}.crt"
     # check if CRT exists
     if [ ! -f "${crt_file}" ]; then
-        error "Unknow CN : ${cn} (\`${crt_file}' not found)"
+        error "Unknow CN: ${cn} (\`${crt_file}' not found)"
     fi
 
     # check if CRT is a valid
@@ -886,7 +886,7 @@ cert_end_date() {
 
 check() {
     # default expiration alert
-    # TODO : permit override with parameters
+    # TODO: permit override with parameters
     min_day=90
     cur_epoch=$(date -u +'%s')
 
@@ -917,7 +917,7 @@ main() {
     SYSTEM=$(uname | tr '[:upper:]' '[:lower:]')
 
     # default config
-    # TODO : override with /etc/default/shellpki
+    # TODO: override with /etc/default/shellpki
     CONF_FILE="/etc/shellpki/openssl.cnf"
 
     if [ "$(uname)" = "OpenBSD" ]; then