2 files changed, 3 insertions, 6 deletions
diff --git a/api/src/main/java/org/semver/Version.java b/api/src/main/java/org/semver/Version.java
index a6bb770..a878043 100755
--- a/api/src/main/java/org/semver/Version.java
+++ b/api/src/main/java/org/semver/Version.java
@@ -97,7 +97,9 @@ public final class Version implements Comparable<Version> {
         } else {
             patch = 0;
         }
-        return new Version(major, minor, patch, matcher.group(4), matcher.group(5));
+        final String separator = matcher.group(4);
+        final String special = matcher.group(5);
+        return new Version(major, minor, patch, separator, "".equals(special) ? null : special);
     }
     
     /**
diff --git a/api/src/test/java/org/semver/VersionTest.java b/api/src/test/java/org/semver/VersionTest.java
index ab32892..11f3d00 100755
--- a/api/src/test/java/org/semver/VersionTest.java
+++ b/api/src/test/java/org/semver/VersionTest.java
@@ -63,11 +63,6 @@ public class VersionTest {
 
     @Test(expected=IllegalArgumentException.class)
     public void shouldInvalidVersion2NotBeParsed() {
-        Version.parse("1.2.3.4");
-    }
-
-    @Test(expected=IllegalArgumentException.class)
-    public void shouldInvalidVersion3NotBeParsed() {
         Version.parse("a.2.3");
     }