diff --git a/TypeGap/GapApiGenerator.cs b/TypeGap/GapApiGenerator.cs
index b3ac325..0c2929d 100644
--- a/TypeGap/GapApiGenerator.cs
+++ b/TypeGap/GapApiGenerator.cs
@@ -283,7 +283,7 @@ protected virtual string BuildUrlString(ApiActionDesc action, string template, A
             if (finalGetParameters.Any())
             {
                 url.Append("?");
-                url.Append(String.Join("&", finalGetParameters.Select(p => $"{p.ParameterName}=\" + {p.ParameterName} + \"")));
+                url.Append(String.Join("&", finalGetParameters.Select(p => $"{p.ParameterName}=\" + encodeURIComponent({p.ParameterName}) + \"")));
             }
 
             return "\"" + _rewriter(url.ToString().TrimStart('/')) + "\"";