diff --git a/core/src/main/java/org/apache/stormcrawler/filtering/basic/BasicURLNormalizer.java b/core/src/main/java/org/apache/stormcrawler/filtering/basic/BasicURLNormalizer.java
index 629bc976b..810c38864 100644
--- a/core/src/main/java/org/apache/stormcrawler/filtering/basic/BasicURLNormalizer.java
+++ b/core/src/main/java/org/apache/stormcrawler/filtering/basic/BasicURLNormalizer.java
@@ -145,7 +145,7 @@ public class BasicURLNormalizer extends URLFilter {
             // properly encode characters in path/file using percent-encoding
             String file2 = unescapePath(file);
             file2 = escapePath(file2);
-            if (!file.equals(file2)) {
+            if (!file.equalsIgnoreCase(file2)) {
                 hasChanged = true;
             }
             if (hasChanged) {
diff --git a/core/src/test/java/org/apache/stormcrawler/filtering/BasicURLNormalizerTest.java b/core/src/test/java/org/apache/stormcrawler/filtering/BasicURLNormalizerTest.java
index 250ea401a..3c84257cb 100644
--- a/core/src/test/java/org/apache/stormcrawler/filtering/BasicURLNormalizerTest.java
+++ b/core/src/test/java/org/apache/stormcrawler/filtering/BasicURLNormalizerTest.java
@@ -300,6 +300,22 @@ void testNonStandardPercentEncoding() throws MalformedURLException {
         assertEquals(expectedURL, normalizedUrl, "Failed to filter query string");
     }
 
+    // https://github.com/apache/incubator-stormcrawler/issues/1448
+    @Test
+    void testProperURLEncodingWithLowerCase() throws MalformedURLException {
+        URLFilter urlFilter = createFilter(queryParamsToFilter);
+        String urlWithEscapedCharacters = "http://www.example.com/Exhibitions/Detail/NjAxOA%3d%3d";
+        String expectedResult = "http://www.example.com/Exhibitions/Detail/NjAxOA%3d%3d";
+        // normalization should not change this url.
+        URL testSourceUrl = new URL(urlWithEscapedCharacters);
+        String testUrl = urlWithEscapedCharacters;
+        String normalizedUrl = urlFilter.filter(testSourceUrl, new Metadata(), testUrl);
+        assertEquals(
+                expectedResult,
+                normalizedUrl,
+                "Failed to normalize url encoded url with lower case letters");
+    }
+
     @Test
     void testHostIDNtoASCII() throws MalformedURLException {
         ObjectNode filterParams = new ObjectNode(JsonNodeFactory.instance);