diff --git a/requirements-dev.txt b/requirements-dev.txt
index b663c725..49239d6e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -7,8 +7,10 @@ mypy>=0.990,<1.1.0; platform_machine != "aarch64" and python_version >= "3.7"
 black==22.3.0
 types-requests==2.28.11.16
 # Prompting libraries needed for testing
-langchain==0.0.302; python_version>="3.9"
-openai>=0.27; python_version>="3.9"
+langchain==0.0.331; python_version>="3.9"
+# Workaround for LangChain bug: pin OpenAI version. To be removed after LangChain has been fixed - see
+# https://github.com/langchain-ai/langchain/issues/12967.
+openai>=0.27,<=0.28.1; python_version>="3.9"
 
 # Necessary for running all local models on GPU.
 transformers[sentencepiece]>=4.0.0
diff --git a/setup.cfg b/setup.cfg
index c1d91c9e..2464317a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -45,7 +45,7 @@ spacy_misc =
 
 [options.extras_require]
 langchain =
-    langchain==0.0.249
+    langchain==0.0.331
 transformers =
     torch>=1.13.1,<2.0
     transformers>=4.28.1,<5.0