diff --git a/Convert-3.3.1.alfredworkflow b/Convert-3.4.alfredworkflow
similarity index 94%
rename from Convert-3.3.1.alfredworkflow
rename to Convert-3.4.alfredworkflow
index 8a5887c..59c9133 100644
Binary files a/Convert-3.3.1.alfredworkflow and b/Convert-3.4.alfredworkflow differ
diff --git a/src/convert.py b/src/convert.py
index 6fc5cb7..c0c6580 100755
--- a/src/convert.py
+++ b/src/convert.py
@@ -368,10 +368,12 @@ def parse_quantity(self, query):
 
         """
         qty = []
-        qtychars = ('1234567890' + self.thousands_separator +
+        qtychars = ('+-1234567890' + self.thousands_separator +
                     self.decimal_separator)
         for c in query:
             if c in qtychars:
+                if c == '+':
+                    qty.append('')
                 if c == self.thousands_separator:
                     log.debug('ignored thousands separator "%s"', c)
                     # Append an empty string so qty length is correct
diff --git a/src/info.plist b/src/info.plist
index b3a300b..b41c563 100644
--- a/src/info.plist
+++ b/src/info.plist
@@ -637,7 +637,7 @@ UPDATE_INTERVAL is the number of minutes between exchange rate updates.</string>
 		<string>APP_KEY</string>
 	</array>
 	<key>version</key>
-	<string>3.3.1</string>
+	<string>3.4</string>
 	<key>webaddress</key>
 	<string></string>
 </dict>