diff --git a/core/src/main/java/org/owasp/dependencycheck/data/update/NvdApiDataSource.java b/core/src/main/java/org/owasp/dependencycheck/data/update/NvdApiDataSource.java
index 09fee6f9799..c4262b95ad2 100644
--- a/core/src/main/java/org/owasp/dependencycheck/data/update/NvdApiDataSource.java
+++ b/core/src/main/java/org/owasp/dependencycheck/data/update/NvdApiDataSource.java
@@ -119,7 +119,7 @@ private boolean processDatafeed(String nvdDataFeedUrl) throws UpdateException {
                 String pattern = null;
                 if (nvdDataFeedUrl.endsWith(".json.gz")) {
                     final int lio = nvdDataFeedUrl.lastIndexOf("/");
-                    pattern = nvdDataFeedUrl.substring(lio);
+                    pattern = nvdDataFeedUrl.substring(lio + 1);
                     url = nvdDataFeedUrl.substring(0, lio);
                 } else {
                     url = nvdDataFeedUrl;