diff --git a/src/openalpr/alpr.cpp b/src/openalpr/alpr.cpp
index c9d2a88..d2ee8f6 100644
--- a/src/openalpr/alpr.cpp
+++ b/src/openalpr/alpr.cpp
@@ -59,11 +59,11 @@ AlprResults Alpr::recognize(unsigned char* pixelData, int bytesPerPixel, int img
 
 std::string Alpr::toJson( AlprResults results )
 {
-  return impl->toJson(results);
+  return AlprImpl::toJson(results);
 }
 
 AlprResults Alpr::fromJson(std::string json) {
-  return impl->fromJson(json);
+  return AlprImpl::fromJson(json);
 }
 
 
diff --git a/src/openalpr/alpr.h b/src/openalpr/alpr.h
index f737e06..6bec99c 100644
--- a/src/openalpr/alpr.h
+++ b/src/openalpr/alpr.h
@@ -114,8 +114,8 @@ class Alpr
     AlprResults recognize(unsigned char* pixelData, int bytesPerPixel, int imgWidth, int imgHeight, std::vector<AlprRegionOfInterest> regionsOfInterest);
 
     
-    std::string toJson(const AlprResults results);
-	AlprResults fromJson(std::string json);
+    static std::string toJson(const AlprResults results);
+	static AlprResults fromJson(std::string json);
 
     bool isLoaded();
     
diff --git a/src/openalpr/alpr_impl.h b/src/openalpr/alpr_impl.h
index cebd565..b8963eb 100644
--- a/src/openalpr/alpr_impl.h
+++ b/src/openalpr/alpr_impl.h
@@ -79,8 +79,8 @@ class AlprImpl
     void setTopN(int topn);
     void setDefaultRegion(std::string region);
     
-    std::string toJson( const AlprResults results );
-	AlprResults fromJson(std::string json);
+    static std::string toJson( const AlprResults results );
+	static AlprResults fromJson(std::string json);
     static std::string getVersion();
     
     Config* config;
@@ -99,7 +99,7 @@ class AlprImpl
     
     std::vector<cv::Rect> convertRects(std::vector<AlprRegionOfInterest> regionsOfInterest);
     
-    cJSON* createJsonObj(const AlprPlateResult* result);
+    static cJSON* createJsonObj(const AlprPlateResult* result);
 };
 
 
diff --git a/src/tests/test_api.cpp b/src/tests/test_api.cpp
index cd9e508..a469edf 100644
--- a/src/tests/test_api.cpp
+++ b/src/tests/test_api.cpp
@@ -18,7 +18,6 @@ using namespace std;
 
 TEST_CASE( "JSON Serialization/Deserialization", "[json]" ) {
   
-  Alpr alpr("us");
   AlprResults origResults;
   origResults.epoch_time = getEpochTime();
   origResults.img_width = 640;
@@ -53,8 +52,8 @@ TEST_CASE( "JSON Serialization/Deserialization", "[json]" ) {
   origResults.plates.push_back(apr);
   
   
-  std::string resultsJson = alpr.toJson(origResults);
-  AlprResults roundTrip = alpr.fromJson(resultsJson);
+  std::string resultsJson = Alpr::toJson(origResults);
+  AlprResults roundTrip = Alpr::fromJson(resultsJson);
   
   REQUIRE( roundTrip.epoch_time == origResults.epoch_time );
   REQUIRE( roundTrip.img_width == origResults.img_width );