diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c15d65..1b5efae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,7 @@
-cmake_minimum_required(VERSION 3.24)
+# 3.22 is Ubuntu 22.04 LTS's stock cmake. Nothing here uses a 3.23+ feature --
+# no FILE_SET, no cmake_path, no TARGET_RUNTIME_DLLS, no CMP0135-dependent
+# FetchContent URL handling -- so the higher floor only excluded the current LTS.
+cmake_minimum_required(VERSION 3.22)
 project(MuTap VERSION 0.1.0 LANGUAGES C CXX)
 
 # ------------------------------------------------------------------------------
diff --git a/submodules/dsptap b/submodules/dsptap
index ff6fc6c..41215c6 160000
--- a/submodules/dsptap
+++ b/submodules/dsptap
@@ -1 +1 @@
-Subproject commit ff6fc6c5067f675316fd07a05e9c078dbc23b1bd
+Subproject commit 41215c6590f6c72e2e30b54ce373b7bc0e7967bd