diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 554cac3..5e3c2df 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -38,6 +38,10 @@ jobs:
     with:
       app_id: apius_lang_entropy
       version: ${{ needs.version.outputs.version }}
+      # Splunk versions this app supports (declared on the Splunkbase release).
+      # Floor is 9.2 — the app uses statistics.fmean/quantiles (Python 3.8+),
+      # and 9.0/9.1 ship Python 3.7. 10.2+ is enabled by python.required.
+      splunk_versions: "9.2,9.3,9.4,10.0,10.1,10.2,10.3,10.4,10.5"
       # Splunkbase listing id (repo variable). Empty -> Splunkbase publish is
       # skipped by the reusable workflow; the manual approval gate lives in the
       # `splunkbase` Environment.
diff --git a/apius_lang_entropy/default/commands.conf b/apius_lang_entropy/default/commands.conf
index c08aa5a..b89397f 100644
--- a/apius_lang_entropy/default/commands.conf
+++ b/apius_lang_entropy/default/commands.conf
@@ -2,3 +2,4 @@
 filename = entropy_command.py
 chunked = true
 python.version = python3
+python.required = 3.9
diff --git a/apius_lang_entropy/default/restmap.conf b/apius_lang_entropy/default/restmap.conf
index bc5b2ce..117deaf 100644
--- a/apius_lang_entropy/default/restmap.conf
+++ b/apius_lang_entropy/default/restmap.conf
@@ -8,6 +8,7 @@ output_modes = json
 passPayload = true
 passHttpHeaders = true
 python.version = python3
+python.required = 3.9
 
 [script:entropy_lab]
 match = /entropy_lab
@@ -19,3 +20,4 @@ output_modes = json
 passPayload = true
 passHttpHeaders = true
 python.version = python3
+python.required = 3.9