diff --git a/HISTORY.rst b/HISTORY.rst
index 6fbdca7..d7b3866 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,11 @@ History
 =======
 
 
+v0.20.3 (2023-11-29)
+
+* Add Databricks functions to read/write constants for Data Science to use across projects.
+
+
 v0.20.2 (2023-11-16)
 
 * Hard-code 'us-east-1' and 'us-east-2' as regions in SQS AwsServiceManager.
diff --git a/aioradio/ds_utils.py b/aioradio/ds_utils.py
index 7897db2..0b02074 100644
--- a/aioradio/ds_utils.py
+++ b/aioradio/ds_utils.py
@@ -145,6 +145,35 @@ def merge_pandas_df_in_db(df, target, on, partition_by=None):
             raise
 
 
+def write_constants_to_db(df, df_library='pandas'):
+    """Write constants defined in a dataframe to databricks.
+
+    Each constant value is defined as a JSON string. See schema of
+    dsc_prd.student_data.constants.
+    """
+
+    table = f"{db_catalog('prod')}.student_data.constants"
+
+    if df_library.lower() == 'pandas':
+        merge_spark_df_in_db(spark.createDataFrame(df), table, on=['key'])
+    elif df_library.lower() == 'polars':
+        merge_spark_df_in_db(spark.createDataFrame(df.to_pandas()), table, on=['key'])
+    elif df_library.lower() == 'spark':
+        merge_spark_df_in_db(df, table, on=['key'])
+    else:
+        logger.info(f'Unknown dataframe library {df_library}')
+
+
+def read_constants_from_db(constants_list=None):
+    """Read all constants or pass in a list to filter constants."""
+
+    table = f"{db_catalog('prod')}.student_data.constants"
+    constants = '*' if constants_list is None else ','.join(constants_list)
+    mapping = {i['key']: json.loads(i['value']) for i in sql_to_polars_df(f'SELECT {constants} FROM {table}').to_dicts()}
+
+    return mapping
+
+
 ################################## DataFrame functions ####################################
 
 
diff --git a/aioradio/requirements.txt b/aioradio/requirements.txt
index a2b8376..f100ad8 100644
--- a/aioradio/requirements.txt
+++ b/aioradio/requirements.txt
@@ -3,7 +3,7 @@ aiojobs==1.2.0
 backoff==2.2.1
 boto3==1.28.17
 botocore==1.31.17
-cython==3.0.5
+cython==3.0.6
 ddtrace==1.11.2
 dominodatalab==1.2.4
 fakeredis==2.20.0
@@ -11,13 +11,13 @@ faust-cchardet==2.1.19
 flask==2.1.2
 flask-cors==3.0.10
 haversine==2.8.0
-httpx==0.25.1
+httpx==0.25.2
 mandrill==1.0.60
 moto==3.1.18
 openpyxl==3.0.10
 orjson==3.8.10
 pandas==2.1.3
-polars==0.19.13
+polars==0.19.17
 pre-commit==3.5.0
 psycopg2-binary==2.9.9
 pyarrow==13.0.0
@@ -32,4 +32,4 @@ python-json-logger==2.0.7
 redis==5.0.1
 twine==4.0.2
 werkzeug==2.1.2
-wheel==0.41.3
+wheel==0.42.0
diff --git a/setup.py b/setup.py
index 9e2f062..c815fb5 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
     long_description = fileobj.read()
 
 setup(name='aioradio',
-    version='0.20.2',
+    version='0.20.3',
     description='Generic asynchronous i/o python utilities for AWS services (SQS, S3, DynamoDB, Secrets Manager), Redis, MSSQL (pyodbc), JIRA and more',
     long_description=long_description,
     long_description_content_type="text/markdown",