diff --git a/libs/langchain/langchain/chains/query_constructor/ir.py b/libs/langchain/langchain/chains/query_constructor/ir.py
index c8d6fc976b6..9f412aedb29 100644
--- a/libs/langchain/langchain/chains/query_constructor/ir.py
+++ b/libs/langchain/langchain/chains/query_constructor/ir.py
@@ -88,6 +88,8 @@ class Comparator(str, Enum):
     LTE = "lte"
     CONTAIN = "contain"
     LIKE = "like"
+    IN = "in"
+    NIN = "nin"
 
 
 class FilterDirective(Expr, ABC):
diff --git a/libs/langchain/langchain/retrievers/self_query/pinecone.py b/libs/langchain/langchain/retrievers/self_query/pinecone.py
index a39fc310bf4..80c401dd95f 100644
--- a/libs/langchain/langchain/retrievers/self_query/pinecone.py
+++ b/libs/langchain/langchain/retrievers/self_query/pinecone.py
@@ -20,6 +20,8 @@ class PineconeTranslator(Visitor):
         Comparator.LTE,
         Comparator.GT,
         Comparator.GTE,
+        Comparator.IN,
+        Comparator.NIN,
     )
     """Subset of allowed logical comparators."""
     allowed_operators = (Operator.AND, Operator.OR)
@@ -34,6 +36,11 @@ class PineconeTranslator(Visitor):
         return {self._format_func(operation.operator): args}
 
     def visit_comparison(self, comparison: Comparison) -> Dict:
+        if comparison.comparator in (Comparator.IN, Comparator.NIN) and not isinstance(
+            comparison.value, list
+        ):
+            comparison.value = [comparison.value]
+
         return {
             comparison.attribute: {
                 self._format_func(comparison.comparator): comparison.value
diff --git a/libs/langchain/pyproject.toml b/libs/langchain/pyproject.toml
index 5c06278cc8c..72a8e9087df 100644
--- a/libs/langchain/pyproject.toml
+++ b/libs/langchain/pyproject.toml
@@ -413,4 +413,4 @@ ignore-regex = '.*(Stati Uniti|Tense=Pres).*'
 # whats is a typo but used frequently in queries so kept as is
 # aapply - async apply
 # unsecure - typo but part of API, decided to not bother for now
-ignore-words-list = 'momento,collison,ned,foor,reworkd,parth,whats,aapply,mysogyny,unsecure,damon,crate,aadd,symbl,precesses,accademia'
+ignore-words-list = 'momento,collison,ned,foor,reworkd,parth,whats,aapply,mysogyny,unsecure,damon,crate,aadd,symbl,precesses,accademia,nin'
diff --git a/pyproject.toml b/pyproject.toml
index 0d9ad96fe11..071c1a2605e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,4 +40,4 @@ ignore-regex = '.*(Stati Uniti|Tense=Pres).*'
 # whats is a typo but used frequently in queries so kept as is
 # aapply - async apply
 # unsecure - typo but part of API, decided to not bother for now
-ignore-words-list = 'momento,collison,ned,foor,reworkd,parth,whats,aapply,mysogyny,unsecure,damon,crate,aadd,symbl,precesses,accademia'
+ignore-words-list = 'momento,collison,ned,foor,reworkd,parth,whats,aapply,mysogyny,unsecure,damon,crate,aadd,symbl,precesses,accademia,nin'