diff --git a/cumulus_etl/deid/philter.py b/cumulus_etl/deid/philter.py
index 1dd7acc..92304a0 100644
--- a/cumulus_etl/deid/philter.py
+++ b/cumulus_etl/deid/philter.py
@@ -16,7 +16,7 @@ class Philter:
     def __init__(self):
         # Ensure all the nltk data that our filter_config (below) needs is available.
         # In docker deployments, these should already be shipped with our docker image.
-        nltk.download("averaged_perceptron_tagger", quiet=True)
+        nltk.download("averaged_perceptron_tagger_eng", quiet=True)
 
         # philter-lite does not seem to have any easy way to reference this default config...?
         filter_config = os.path.join(os.path.dirname(__file__), "philter-config.toml")
diff --git a/pyproject.toml b/pyproject.toml
index 5ed98e8..4a303aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,6 +18,7 @@ dependencies = [
     "inscriptis < 3",
     "jwcrypto < 2",
     "label-studio-sdk < 2",
+    "nltk >= 3.9, < 4",
     "openai < 2",
     "oracledb < 3",
     "philter-lite < 1",