diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 777a051..bba6e9f 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -13,25 +13,25 @@ jobs:
     strategy:
       matrix:
           os: [ubuntu-latest, macos-latest, windows-latest]
-          python-version: [3.6, 3.7, 3.8, 3.9]
+          python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
       fail-fast: false
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout python module repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Checkout posteriordb repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: stan-dev/posteriordb
           path: posteriordb
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 151e3aa..5fc9326 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,25 +16,25 @@ jobs:
     strategy:
       matrix:
           os: [ubuntu-latest, macos-latest, windows-latest]
-          python-version: [3.6, 3.7, 3.8, 3.9]
+          python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
       fail-fast: false
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout python module repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Checkout posteriordb repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: stan-dev/posteriordb
           path: posteriordb
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
diff --git a/src/posteriordb/dataset.py b/src/posteriordb/dataset.py
index 8aaeb0d..7e6b976 100644
--- a/src/posteriordb/dataset.py
+++ b/src/posteriordb/dataset.py
@@ -1,5 +1,4 @@
 import json
-import os
 import tempfile
 from typing import Union
 from zipfile import ZipFile
diff --git a/src/posteriordb/model.py b/src/posteriordb/model.py
index 680fc25..f0ee6d4 100644
--- a/src/posteriordb/model.py
+++ b/src/posteriordb/model.py
@@ -1,4 +1,3 @@
-import os
 from typing import Union
 
 from .posterior_database import PosteriorDatabase
diff --git a/src/posteriordb/posterior.py b/src/posteriordb/posterior.py
index 33d44f3..5f96a39 100644
--- a/src/posteriordb/posterior.py
+++ b/src/posteriordb/posterior.py
@@ -38,6 +38,11 @@ def reference_draws_file_path(self):
 
     def reference_draws(self):
         reference_name = self.reference_draws_info()["name"]
-        with ZipFile(self.reference_draws_file_path() + ".zip", "r") as z:
-            with z.open(reference_name + ".json", "r") as f:
-                return json.load(f)
+        file_path = self.reference_draws_file_path()
+        if file_path.exists():
+            with ZipFile(file_path, "r") as z:
+                with z.open(reference_name + ".json", "r") as f:
+                    reference_draws =  json.load(f)
+        else:
+            raise ValueError(f"Missing reference_draws: {file_path}")
+        return reference_draws
diff --git a/src/posteriordb/posterior_database.py b/src/posteriordb/posterior_database.py
index 7340ca3..e7246f7 100644
--- a/src/posteriordb/posterior_database.py
+++ b/src/posteriordb/posterior_database.py
@@ -84,8 +84,8 @@ def get_reference_draws_path(self, name: str):
         reference_root = os.path.join(self.path, "reference_posteriors/draws/draws")
         reference_name = self.get_posterior_info(name)["reference_posterior_name"]
         assert reference_name is not None
-        file_path = os.path.join(reference_root, reference_name + ".json")
-        return file_path
+        file_path = os.path.join(reference_root, reference_name + ".json.zip")
+        return Path(file_path)
 
     def get_reference_draws_info(self, name: str):
         reference_root = os.path.join(self.path, "reference_posteriors/draws/info")
diff --git a/src/posteriordb/posterior_database_github.py b/src/posteriordb/posterior_database_github.py
index 8478be6..1db88d5 100644
--- a/src/posteriordb/posterior_database_github.py
+++ b/src/posteriordb/posterior_database_github.py
@@ -1,7 +1,6 @@
 import hashlib
 import json
 import os
-import tempfile
 from pathlib import Path
 import requests
 
@@ -131,6 +130,24 @@ def load_info(path, assertion_function, metadata, overwrite=False):
     return info
 
 
+def load_zip_file(path, metadata, overwrite=False):
+    if not path.exists():
+        if metadata is not None:
+            download_file(metadata["download_url"], path)
+        else:
+            raise TypeError("File was not found in GitHub")
+    elif overwrite:
+        if metadata is not None:
+            download_file(metadata["download_url"], path, sha=metadata["sha"])
+    return path
+
+
+def load_draws(path, assertion_function, metadata, overwrite=False):
+    path = load_zip_file(path, metadata, overwrite=overwrite)
+    assertion_function(path)
+    return path
+
+
 def filenames_in_dir_no_extension(directory, gh_directory, extension):
     path = Path(directory)
 
@@ -266,8 +283,13 @@ def get_reference_draws_path(self, name: str):
         reference_root = self.path / "reference_posteriors" / "draws" / "draws"
         reference_name = self.get_posterior_info(name).get("reference_posterior_name")
         assert reference_name is not None
-        path = reference_root / (reference_name + ".json")
-        return path
+        path = reference_root / (reference_name + ".json.zip")
+        return load_draws(
+            path,
+            temporary_no_assertions,
+            self._links.get(path, None),
+            overwrite=self.overwrite,
+        )
 
     def get_reference_draws_info(self, name: str):
         reference_root = self.path / "reference_posteriors" / "draws" / "info"