diff --git a/openvidu-server/docker/openvidu-coturn/discover_my_public_ip.sh b/openvidu-server/docker/openvidu-coturn/discover_my_public_ip.sh
index 8c0908b1..03302c04 100755
--- a/openvidu-server/docker/openvidu-coturn/discover_my_public_ip.sh
+++ b/openvidu-server/docker/openvidu-coturn/discover_my_public_ip.sh
@@ -9,7 +9,7 @@ function valid_ip()
     if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
         OIFS=$IFS
         IFS='.'
-        ip=($ip)
+        ip=("$ip")
         IFS=$OIFS
         [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
             && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
@@ -32,16 +32,16 @@ SERVICES=(
 # Get public ip
 for service in "${SERVICES[@]}"; do
     RUN_COMMAND=$($service | tr -d '[:space:]')
-    IP=$(echo $RUN_COMMAND | cut -d':' -f1)
-    HTTP_CODE=$(echo $RUN_COMMAND | cut -d':' -f2)
+    IP=$(echo "$RUN_COMMAND" | cut -d':' -f1)
+    HTTP_CODE=$(echo "$RUN_COMMAND" | cut -d':' -f2)
 
     if [ "$HTTP_CODE" == "200" ]; then
         if valid_ip "$IP"; then 
-            printf "$IP"
+            printf "%s" "$IP"
             exit 0
         fi
     fi
 done
 
 printf "error"
-exit 0
+exit 0
\ No newline at end of file
diff --git a/openvidu-server/docker/openvidu-server-pro/discover_my_public_ip.sh b/openvidu-server/docker/openvidu-server-pro/discover_my_public_ip.sh
index 8c0908b1..03302c04 100755
--- a/openvidu-server/docker/openvidu-server-pro/discover_my_public_ip.sh
+++ b/openvidu-server/docker/openvidu-server-pro/discover_my_public_ip.sh
@@ -9,7 +9,7 @@ function valid_ip()
     if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
         OIFS=$IFS
         IFS='.'
-        ip=($ip)
+        ip=("$ip")
         IFS=$OIFS
         [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
             && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
@@ -32,16 +32,16 @@ SERVICES=(
 # Get public ip
 for service in "${SERVICES[@]}"; do
     RUN_COMMAND=$($service | tr -d '[:space:]')
-    IP=$(echo $RUN_COMMAND | cut -d':' -f1)
-    HTTP_CODE=$(echo $RUN_COMMAND | cut -d':' -f2)
+    IP=$(echo "$RUN_COMMAND" | cut -d':' -f1)
+    HTTP_CODE=$(echo "$RUN_COMMAND" | cut -d':' -f2)
 
     if [ "$HTTP_CODE" == "200" ]; then
         if valid_ip "$IP"; then 
-            printf "$IP"
+            printf "%s" "$IP"
             exit 0
         fi
     fi
 done
 
 printf "error"
-exit 0
+exit 0
\ No newline at end of file
diff --git a/openvidu-server/docker/openvidu-server/discover_my_public_ip.sh b/openvidu-server/docker/openvidu-server/discover_my_public_ip.sh
index 8c0908b1..03302c04 100755
--- a/openvidu-server/docker/openvidu-server/discover_my_public_ip.sh
+++ b/openvidu-server/docker/openvidu-server/discover_my_public_ip.sh
@@ -9,7 +9,7 @@ function valid_ip()
     if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
         OIFS=$IFS
         IFS='.'
-        ip=($ip)
+        ip=("$ip")
         IFS=$OIFS
         [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
             && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
@@ -32,16 +32,16 @@ SERVICES=(
 # Get public ip
 for service in "${SERVICES[@]}"; do
     RUN_COMMAND=$($service | tr -d '[:space:]')
-    IP=$(echo $RUN_COMMAND | cut -d':' -f1)
-    HTTP_CODE=$(echo $RUN_COMMAND | cut -d':' -f2)
+    IP=$(echo "$RUN_COMMAND" | cut -d':' -f1)
+    HTTP_CODE=$(echo "$RUN_COMMAND" | cut -d':' -f2)
 
     if [ "$HTTP_CODE" == "200" ]; then
         if valid_ip "$IP"; then 
-            printf "$IP"
+            printf "%s" "$IP"
             exit 0
         fi
     fi
 done
 
 printf "error"
-exit 0
+exit 0
\ No newline at end of file