diff --git a/CMakeLists.txt b/CMakeLists.txt
index c1efae0..d11896b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ include(FetchContent)
 FetchContent_Declare(
 	signalsmith-linear
 	GIT_REPOSITORY https://github.com/Signalsmith-Audio/linear.git
-	GIT_TAG 0.1.2
+	GIT_TAG 0.2.2
 	GIT_SHALLOW ON
 )
 FetchContent_MakeAvailable(signalsmith-linear)
diff --git a/README.md b/README.md
index bc0e613..c3c57e7 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,7 @@ The algorithm has a lot of number-crunching, so Debug builds are much slower (up
 
 ### Dependencies and `#define`s
 
-This uses the [Signalsmith Linear](https://github.com/Signalsmith-Audio/linear) library for FFTs and other speedups.  There are [flags]([Linear repo](https://github.com/Signalsmith-Audio/linear?tab=readme-ov-file#building)) to enable Accelerate (`SIGNALSMITH_USE_ACCELERATE`) or IPP (`SIGNALSMITH_USE_IPP`).
+This uses the [Signalsmith Linear](https://github.com/Signalsmith-Audio/linear) library for FFTs and other speedups.  There are [flags]([Linear repo](https://github.com/Signalsmith-Audio/linear?tab=readme-ov-file#building)) to use faster FFT implementations (`SIGNALSMITH_USE_ACCELERATE`/`SIGNALSMITH_USE_IPP`/`SIGNALSMITH_USE_PFFFT`/`SIGNALSMITH_USE_PFFFT_DOUBLE`), and corresponding CMake options.
 
 ## License
 
diff --git a/SUPPORT.txt b/SUPPORT.txt
new file mode 100644
index 0000000..eec8a84
--- /dev/null
+++ b/SUPPORT.txt
@@ -0,0 +1,3 @@
+# See: https://github.com/geraintluff/SUPPORT.txt
+
+2030-01-01 Geraint Luff <geraint@signalsmith-audio.co.uk>