diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 2b1f984..06c6e9a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -22,15 +22,23 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6'
+          - '1.3'  # compat require
+          - 'lts'
           - '1'
-          - 'nightly'
         os:
           - ubuntu-latest
-          - macOS-latest
+          - macos-13 # Intel
           - windows-latest
         arch:
           - x64
+        include:
+          # macos-latest -> Apple Silicon (Need julia >= v1.8)
+          - os: macos-latest
+            arch: 'aarch64'
+            version: 'lts'
+          - os: macos-latest
+            arch: 'aarch64'
+            version: '1'
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/cache@v2
diff --git a/Project.toml b/Project.toml
index 586f7f2..bde53be 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,7 +11,6 @@ REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 [compat]
 SpecialFunctions = "0.8, 0.9, 0.10, 1"
 GSL_jll = "2.6"
-REPL = "1.3.0"
 julia = "1.3.0"
 
 [extras]
diff --git a/src/manual_wrappers.jl b/src/manual_wrappers.jl
index 989c69a..aa14aa0 100644
--- a/src/manual_wrappers.jl
+++ b/src/manual_wrappers.jl
@@ -35,6 +35,11 @@ gsl_function_helper(x::Cdouble, fn)::Cdouble = fn(x)
 # The following code relies on `gsl_function` being a mutable type
 # (such that we can call `pointer_from_objref` on it) to simplify the object structure
 # a little bit and avoid hitting some limitation of the allocation optimizer.
+@static if VERSION < v"1.5"
+    # rename isimmutable to ismutable #34652
+    # https://github.com/JuliaLang/julia/pull/34652
+    ismutable(@nospecialize(x)) = !isimmutable(x)
+end
 @assert ismutable(gsl_function(C_NULL, C_NULL))
 
 function wrap_gsl_function(fn::F) where F