diff --git a/src/main/java/com/lmax/simpledsl/internal/RepeatingParamValues.java b/src/main/java/com/lmax/simpledsl/internal/RepeatingParamValues.java
index d067145..50df28f 100644
--- a/src/main/java/com/lmax/simpledsl/internal/RepeatingParamValues.java
+++ b/src/main/java/com/lmax/simpledsl/internal/RepeatingParamValues.java
@@ -53,7 +53,7 @@ public DslArg[] getParams()
     private List<String> getValues(final String name)
     {
 
-        if (name == null || stream(dslArgs).noneMatch(arg -> arg.getName().equals(name.toLowerCase())))
+        if (name == null || stream(dslArgs).noneMatch(arg -> arg.getName().equalsIgnoreCase(name)))
         {
             throw new IllegalArgumentException(String.format("Parameter %s does not exist in this repeating group", name));
         }
diff --git a/src/test/java/com/lmax/simpledsl/internal/DslParamsParserTest.java b/src/test/java/com/lmax/simpledsl/internal/DslParamsParserTest.java
index ca51a9f..1beb369 100644
--- a/src/test/java/com/lmax/simpledsl/internal/DslParamsParserTest.java
+++ b/src/test/java/com/lmax/simpledsl/internal/DslParamsParserTest.java
@@ -646,7 +646,7 @@ public void shouldMatchAllowedValuesCaseInsensitivelyAndReturnValuesUsingTheCase
     {
         final String[] args = {"a: value", "myGroup: joe", "myValue: a"};
         final DslArg[] parameters = {
-                new RequiredArg("a"),
+                new RequiredArg("A"),
                 new RepeatingArgGroup(
                         new RequiredArg("myGroup").setAllowedValues("Joe", "Jenny"),
                         new RequiredArg("myValue").setAllowedValues("A", "B"))
@@ -659,8 +659,8 @@ public void shouldMatchAllowedValuesCaseInsensitivelyAndReturnValuesUsingTheCase
         assertEquals("value", params.value("a"));
         final RepeatingGroup[] groups = params.valuesAsGroup("myGroup");
         assertEquals(1, groups.length);
-        assertEquals("Joe", groups[0].value("myGroup"));
-        assertEquals("A", groups[0].value("myValue"));
+        assertEquals("Joe", groups[0].values("myGroup")[0]);
+        assertEquals("A", groups[0].values("myValue")[0]);
     }
 
     @Test
diff --git a/src/test/java/com/lmax/simpledsl/internal/RepeatingParamValuesTest.java b/src/test/java/com/lmax/simpledsl/internal/RepeatingParamValuesTest.java
index 8a5f11b..b731e52 100755
--- a/src/test/java/com/lmax/simpledsl/internal/RepeatingParamValuesTest.java
+++ b/src/test/java/com/lmax/simpledsl/internal/RepeatingParamValuesTest.java
@@ -150,4 +150,18 @@ void shouldThrowExceptionWhenAttemptToGetValueButContainsMultiple()
 
         assertEquals("values() should be used when multiple values are allowed", exception.getMessage());
     }
+
+    @Test
+    public void shouldRetrieveValueCaseWithACaseInsensitiveKey()
+    {
+        final RequiredArg requiredArg = new RequiredArg("foo");
+        final OptionalArg otherArg = new OptionalArg("bar");
+        final Map<String, List<String>> values = new HashMap<>();
+        values.put("foo", Collections.singletonList(""));
+        values.put("bar", Collections.singletonList("123"));
+        final RepeatingParamValues params = new RepeatingParamValues(asList(requiredArg, otherArg).toArray(new DslArg[0]), values);
+
+        assertTrue(params.hasValue("Bar"));
+        assertEquals("123", params.value("BAR"));
+    }
 }