diff --git a/langchain/utilities/__init__.py b/langchain/utilities/__init__.py
index e8e88f3b723f2..4ba7c28d3cc46 100644
--- a/langchain/utilities/__init__.py
+++ b/langchain/utilities/__init__.py
@@ -3,7 +3,7 @@
 from langchain.requests import RequestsWrapper
 from langchain.utilities.bash import BashProcess
 from langchain.utilities.bing_search import BingSearchAPIWrapper
-from langchain.utilities.imun import ImunAPIWrapper, ImunMultiAPIWrapper
+from langchain.utilities.imun import ImunAPIWrapper, ImunMultiAPIWrapper, ImunCache
 from langchain.utilities.google_search import GoogleSearchAPIWrapper
 from langchain.utilities.google_serper import GoogleSerperAPIWrapper
 from langchain.utilities.searx_search import SearxSearchWrapper
@@ -22,4 +22,5 @@
     "BingSearchAPIWrapper",
     "ImunAPIWrapper",
     "ImunMultiAPIWrapper",
+    "ImunCache",
 ]
diff --git a/langchain/utilities/imun.py b/langchain/utilities/imun.py
index cbb866342f837..004d0a67374ea 100644
--- a/langchain/utilities/imun.py
+++ b/langchain/utilities/imun.py
@@ -4,7 +4,7 @@
 https://azure.microsoft.com/en-us/products/cognitive-services/computer-vision
 """
 import time
-from typing import Dict, List, Tuple
+from typing import Dict, List, Tuple, Optional
 import io
 import imagesize
 
@@ -363,6 +363,16 @@ def create_prompt(results: Dict) -> str:
         answer += IMUN_PROMPT_CELEBS.format(celebs=_concat_objects(celebrities, size=size))
     return answer
 
+class ImunCache(BaseModel):
+    cache: Optional[dict] = {}  #: :meta private:
+    class Config:
+        copy_on_model_validation = 'none'
+    
+    def get(self, key:str)->dict:
+        return self.cache.get(key)
+
+    def set(self, key:str, value:dict):
+        self.cache[key] = value
 
 class ImunAPIWrapper(BaseModel):
     """Wrapper for Image Understanding API.
@@ -371,7 +381,7 @@ class ImunAPIWrapper(BaseModel):
     https://azure.microsoft.com/en-us/products/cognitive-services/computer-vision
     """
 
-    cache: dict  #: :meta private:
+    cache: Optional[ImunCache]  #: :meta private:
     imun_subscription_key: str
     imun_url: str
     params: dict  # "api-version=2023-02-01-preview&features=denseCaptions,Tags"
@@ -383,9 +393,14 @@ class Config:
 
     def _imun_results(self, img_url: str) -> dict:
         param_str = '&'.join([f'{k}={v}' for k,v in self.params.items()])
-        key = f"{self.imun_url}?{param_str}&data={img_url}"
-        if key in self.cache:
-            return self.cache[key]
+        key = f"{self.imun_url}?{param_str}"
+        img_cache = self.cache.get(img_url)
+        if img_cache:
+            if key in img_cache:
+                return img_cache[key]
+        else:
+            img_cache = {}
+            self.cache.set(img_url, img_cache)
         results = {"task": []}
         if "celebrities" in self.imun_url:
             results["task"].append("celebrities")
@@ -489,7 +504,7 @@ def _imun_results(self, img_url: str) -> dict:
                     results["languages"] = languages
                 if _is_handwritten(analyzeResult["styles"]):
                     results["words_style"] = "handwritten "
-        self.cache[key] = results
+        img_cache[key] = results
         return results
 
     @root_validator(pre=True)