diff --git a/Breeze.Sharp/EntityQuery.cs b/Breeze.Sharp/EntityQuery.cs
index 2513240..068f4db 100644
--- a/Breeze.Sharp/EntityQuery.cs
+++ b/Breeze.Sharp/EntityQuery.cs
@@ -217,12 +217,12 @@ public override String GetResourcePath(MetadataStore metadataStore) {
 
     /// <summary> Return the query as JSON url, e.g. "Customer?{where:{FirstName:'Maria'}}" </summary>
     private string GetJsonResourcePath(string resourceName) {
-      var json = JsonQueryExpressionVisitor.Translate(this.Expression);
+      var json = JsonQueryExpressionVisitor.Translate(this.Expression, out string parameters);
       if (json.Length > 2) {
         // TODO may be able to get away with not escaping the URI
         System.Diagnostics.Debug.WriteLine($"json query: {json}");
         var uri = Uri.EscapeUriString(json);
-        return resourceName + '?' + uri;
+        return resourceName + '?' + uri + (parameters != null ? "&" + parameters : string.Empty);
       } else {
         return resourceName;
       }
diff --git a/Breeze.Sharp/Json/JsonQueryExpressionVisitor.cs b/Breeze.Sharp/Json/JsonQueryExpressionVisitor.cs
index d0b6531..bf8a97d 100644
--- a/Breeze.Sharp/Json/JsonQueryExpressionVisitor.cs
+++ b/Breeze.Sharp/Json/JsonQueryExpressionVisitor.cs
@@ -27,7 +27,7 @@ public class JsonQueryExpressionVisitor : ExpressionVisitor {
     private ListExpressionVisitor expandVisitor;
 
     /// <summary> Translate the EntityQuery expression into a JSON string </summary>
-    public static string Translate(Expression expression) {
+    public static string Translate(Expression expression, out string parameters) {
 
       var visitor = new JsonQueryExpressionVisitor();
       visitor.VisitRoot(expression);
@@ -44,7 +44,9 @@ public static string Translate(Expression expression) {
       //without a server-side custom model binder for 'Customer?{"parameters":{"companyName":"C"}}' I cannot have parameters with right values,
       //so I have to use this hack
       if (visitor.Parameters?.Count > 0)
-        json = json + "&" + string.Join("&", visitor.Parameters.Select(kvp => string.Format("{0}={1}", kvp.Key, kvp.Value)));
+        parameters = string.Join("&", visitor.Parameters.Select(kvp => string.Format("{0}={1}", kvp.Key, kvp.Value.Replace("&", "%26"))));
+      else
+        parameters = null;
 
       return json;
     }
diff --git a/Tests/Internal/Tests/JsonQuerySerializationTests.cs b/Tests/Internal/Tests/JsonQuerySerializationTests.cs
index f38172c..66570fe 100644
--- a/Tests/Internal/Tests/JsonQuerySerializationTests.cs
+++ b/Tests/Internal/Tests/JsonQuerySerializationTests.cs
@@ -25,7 +25,7 @@ public void TearDown() {
 
     // TODO somehow compare JSON by structure instead of string, so whitespace changes won't matter
     private void Check(EntityQuery query, string expectedJson) {
-      var json = JsonQueryExpressionVisitor.Translate(query.Expression);
+      var json = JsonQueryExpressionVisitor.Translate(query.Expression, out string parameters);
       Assert.AreEqual(expectedJson, json);
     }