diff --git a/build.properties b/build.properties
index b6c9ff1..2877f83 100644
--- a/build.properties
+++ b/build.properties
@@ -1 +1 @@
-version=1.6-SNAPSHOT
+version=1.6.1-SNAPSHOT
diff --git a/pom.xml b/pom.xml
index f475476..09c92fd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 	<groupId>com.digitalpebble.textclassification</groupId>
 	<artifactId>textclassification</artifactId>
 	<packaging>jar</packaging>
-	<version>1.6</version>
+	<version>1.6.1</version>
 	<name>TextClassificationAPI</name>
 	<description>Java API for TextClassification</description>
 	<url>https://github.com/jnioche/textclassification</url>
diff --git a/src/main/java/com/digitalpebble/classification/TextClassifier.java b/src/main/java/com/digitalpebble/classification/TextClassifier.java
index 0f0d422..1a7d832 100644
--- a/src/main/java/com/digitalpebble/classification/TextClassifier.java
+++ b/src/main/java/com/digitalpebble/classification/TextClassifier.java
@@ -41,7 +41,7 @@ public static TextClassifier getClassifier(String pathResourceDirectory)
   public static TextClassifier getClassifier(File resourceDirectoryFile)
     throws Exception {
     // check whether we need to unzip the resources first
-    if (resourceDirectoryFile.toString().endsWith(".zip")){
+    if (resourceDirectoryFile.toString().endsWith(".zip") && resourceDirectoryFile.isFile()){
       resourceDirectoryFile = UnZip.unzip(resourceDirectoryFile);
     }
     // check the existence of the path