diff --git a/README.md b/README.md
index 9dc7748..61df27d 100644
--- a/README.md
+++ b/README.md
@@ -173,6 +173,7 @@ Apps & Tools shipped with WordOps :
 - [ClamAV](https://github.com/Cisco-Talos/clamav-devel)
 - [cheat.sh](https://github.com/chubin/cheat.sh)
 - [ProFTPd](https://github.com/proftpd/proftpd)
+- [nginx-ultimate-bad-bot-blocker](https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/)
 
 Cache Plugins supported by WordOps :
 
diff --git a/wo/core/fileutils.py b/wo/core/fileutils.py
index 94a70a0..87a3da6 100644
--- a/wo/core/fileutils.py
+++ b/wo/core/fileutils.py
@@ -280,15 +280,15 @@ class WOFileUtils():
         """
             Searches for string in file and returns True or False.
         """
-        if os.path.isfile(fnm):
+        if os.path.isfile('{0}'.format(fnm)):
             try:
                 Log.debug(self, "Finding string {0} to file {1}"
                           .format(sstr, fnm))
-            for line in open(fnm, encoding='utf-8'):
-                if sstr in line:
-                    return True
-            return False
-        except OSError as e:
+                for line in open(fnm, encoding='utf-8'):
+                    if sstr in line:
+                        return True
+                return False
+            except OSError as e:
                 Log.debug(self, "{0}".format(e.strerror))
                 Log.error(self, "Unable to Search string {0} in {1}"
                           .format(sstr, fnm))