diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index 304b989f2..657fd7564 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -28,8 +28,8 @@ jobs:
         - "3.8"  # Earliest version supported by ixmp
         - "3.9"
         - "3.10"
-        - "3.11" # Latest supported by ixmp
-        # - "3.12"  # Pending JPype support; see iiasa/ixmp#501
+        - "3.11"
+        - "3.12"  # Latest supported by ixmp
 
         # commented: force a specific version of pandas, for e.g. pre-release
         # testing
diff --git a/pyproject.toml b/pyproject.toml
index 8b573c047..d66fea7f5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
   "Programming Language :: R",
   "Topic :: Scientific/Engineering",
   "Topic :: Scientific/Engineering :: Information Analysis",