diff --git a/HISTORY.rst b/HISTORY.rst
index 6a5fda56..a0d5432d 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -5,7 +5,7 @@ History
 6.2.1 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Issues `#89 <https://github.com/nazrulworld/fhir.resources/issues/89>`_ & `#90 <https://github.com/nazrulworld/fhir.resources/issues/90>`_ possible breaking for ``FHIRAbstractModel.dict`` (if pydnatic specific extra argument has been provided) is neutralized.[nazrulworld]
 
 
 6.2.0 (2022-01-01)
diff --git a/appveyor.yml b/appveyor.yml
index cd63104d..f457396c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -48,12 +48,6 @@ install:
   - ECHO "Installed SDKs:"
   - ps: "ls \"C:/Program Files/Microsoft SDKs/Windows\""
 
-  # Install Rust dependency
-  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - rustup-init -yv --default-toolchain stable --default-host x86_64-pc-windows-msvc
-  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-  - rustc -vV
-  - cargo -vV
   # Prepend newly installed Python to the PATH of this build (this cannot be
   # done from inside the powershell script as it would require to restart
   # the parent CMD process).
diff --git a/fhir/resources/STU3/fhirabstractmodel.py b/fhir/resources/STU3/fhirabstractmodel.py
index b552894b..45ea31df 100644
--- a/fhir/resources/STU3/fhirabstractmodel.py
+++ b/fhir/resources/STU3/fhirabstractmodel.py
@@ -403,7 +403,20 @@ def dict(
         by_alias: bool = True,
         exclude_none: bool = True,
         exclude_comments: bool = False,
+        **pydantic_extra
     ) -> OrderedDict:
+        """important!
+        there is no impact on ``pydantic_extra`` we keep it as backward compatibility.
+        @see issues https://github.com/nazrulworld/fhir.resources/issues/90
+        & https://github.com/nazrulworld/fhir.resources/issues/89
+        """
+        if len(pydantic_extra) > 0:
+            logger.warning(
+                f"{self.__class__.__name__}.dict method accepts only"
+                "´by_alias´, ´exclude_none´, ´exclude_comments` as parameters"
+                " since version v6.2.0, any extra parameter is simply ignored. "
+                "You should not provide any extra argument."
+            )
         return OrderedDict(
             self._fhir_iter(
                 by_alias=by_alias,
diff --git a/fhir/resources/fhirabstractmodel.py b/fhir/resources/fhirabstractmodel.py
index 78b1a5cc..cb8bfe85 100644
--- a/fhir/resources/fhirabstractmodel.py
+++ b/fhir/resources/fhirabstractmodel.py
@@ -403,7 +403,20 @@ def dict(
         by_alias: bool = True,
         exclude_none: bool = True,
         exclude_comments: bool = False,
+        **pydantic_extra
     ) -> OrderedDict:
+        """important!
+        there is no impact on ``pydantic_extra`` we keep it as backward compatibility.
+        @see issues https://github.com/nazrulworld/fhir.resources/issues/90
+        & https://github.com/nazrulworld/fhir.resources/issues/89
+        """
+        if len(pydantic_extra) > 0:
+            logger.warning(
+                f"{self.__class__.__name__}.dict method accepts only"
+                "´by_alias´, ´exclude_none´, ´exclude_comments` as parameters"
+                " since version v6.2.0, any extra parameter is simply ignored. "
+                "You should not provide any extra argument."
+            )
         return OrderedDict(
             self._fhir_iter(
                 by_alias=by_alias,