diff --git a/src/lemonade/tools/ort_genai/oga.py b/src/lemonade/tools/ort_genai/oga.py
index 7a8ed49..629f6de 100644
--- a/src/lemonade/tools/ort_genai/oga.py
+++ b/src/lemonade/tools/ort_genai/oga.py
@@ -135,7 +135,10 @@ def generate(
         if hasattr(self.model, "type"):
             model_type = self.model.type
         else:
-            with open(os.path.join(self.model_path, "genai_config.json"), "r") as f:
+            with open(
+                os.path.join(self.model_path, "genai_config.json", encoding="utf-8"),
+                "r",
+            ) as f:
                 genai_config = json.load(f)
                 model_type = genai_config["model"]["type"]
 
@@ -150,7 +153,8 @@ def generate(
             if model_type.startswith("phi2") or model_type.startswith("phi3"):
                 chat_template = "<|user|>\n{input} <|end|>\n<|assistant|>"
             elif model_type.startswith("phi4"):
-                chat_template = "<|im_start|>user<|im_sep|>\n{input}<|im_end|>\n<|im_start|>assistant<|im_sep|>"
+                chat_template = "<|im_start|>user<|im_sep|>\n{input} \
+                <|im_end|>\n<|im_start|>assistant<|im_sep|>"
             elif model_type.startswith("llama3"):
                 chat_template = "<|start_header_id|>user<|end_header_id|>\n{input}<|eot_id|> \
                 <|start_header_id|>assistant<|end_header_id|>"