diff --git a/drf_dynamic_fields/__init__.py b/drf_dynamic_fields/__init__.py
index 73ae6cf..4c51fa4 100644
--- a/drf_dynamic_fields/__init__.py
+++ b/drf_dynamic_fields/__init__.py
@@ -43,6 +43,10 @@ def fields(self):
                 warnings.warn('Context does not have access to request. '
                               'See README for more information.')
             return fields
+        
+        # Dynamic fields must be used for GET method only
+        if request.method != 'GET':
+            return fields
 
         # NOTE: drf test framework builds a request object where the query
         # parameters are found under the GET attribute.