diff --git a/.github/workflows/test.yaml b/.github/workflows/CI.yaml
similarity index 54%
rename from .github/workflows/test.yaml
rename to .github/workflows/CI.yaml
index f0c304a..582703c 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/CI.yaml
@@ -1,23 +1,39 @@
-name: Run tests
-
-on: [push, pull_request]
-
+name: CI
+on:
+  push:
+    branches:
+      - master
+    tags: '*'
+  pull_request:
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 jobs:
   test:
+    name: MATLAB ${{ matrix.matlab-version }} - Julia ${{ matrix.julia-version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        julia-version: ['1.5']
-        julia-arch: [x64]
-        os: [ubuntu-latest]
-        
+        matlab-version: 
+          - 'R2021b'
+        julia-version: 
+          - '1.6'
+        os: 
+          - ubuntu-latest
+        arch: 
+          - x64
     steps:
       - name: Install csh
         run: sudo apt-get install -y csh
       - name: Check out repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up MATLAB
         uses: matlab-actions/setup-matlab@v1
+        with:
+          release: ${{ matrix.matlab-version }}
       - name: Set up Julia
         uses: julia-actions/setup-julia@v1
         with:
diff --git a/Project.toml b/Project.toml
index b5f698c..68fbd16 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,4 +11,4 @@ Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 [compat]
 MATLAB = "0.8"
 Reexport = "1"
-julia = "~1.5, 1.7"
+julia = "1.5"
diff --git a/README.md b/README.md
index 18589c1..c379794 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,12 @@
 
 ## Prerequisites
 
+| :exclamation:  This package cannot be used with MATLAB 2022a/2022b because these versions are currently incompatible with [MATLAB.jl](https://github.com/JuliaInterop/MATLAB.jl).  |
+|-----------------------------------------|
+
+| :exclamation:  This package supports Julia 1.6, but does not currently support Julia 1.8.  |
+|-----------------------------------------|
+
 `Mex.jl` requires MATLAB and Julia along with a C++ compiler configured to work with MATLAB's `mex` command, the last is required for building the `mexjulia` MEX function. You can check that a compiler is properly configured by executing:
 
 ```
@@ -16,8 +22,6 @@
 
 from the MATLAB command prompt.
 
-***NOTE:** This project currently only supports Julia 1.5.  Support for Julia 1.6 and greater will be possible when the changes resulting from  https://github.com/JuliaLang/julia/issues/42411 are incorporated into the latest stable release of Julia.*
-
 ## Installation
 
 First ensure that the [MATLAB.jl](https://github.com/JuliaInterop/MATLAB.jl) Julia package can be properly installed.
diff --git a/deps/build.jl b/deps/build.jl
index dcd65cf..3e6d9a0 100644
--- a/deps/build.jl
+++ b/deps/build.jl
@@ -16,7 +16,7 @@ function matlab_escape(str)
 end
 
 function libDir()
-    return if isDebug()
+    return if isDebug() != 0
         dirname(abspath(Libdl.dlpath("libjulia-debug")))
     else
         dirname(abspath(Libdl.dlpath("libjulia")))
@@ -29,14 +29,6 @@ function includeDir()
     return abspath(Sys.BINDIR, Base.INCLUDEDIR, "julia")
 end
 
-function cflags()
-    fl = "-I $(shell_escape(includeDir()))"
-    if Sys.isunix()
-        fl = fl * " -fPIC"
-    end
-    return fl
-end
-
 function ldflags()
     fl = "-L$(shell_escape(libDir()))"
     if Sys.isunix()
@@ -44,7 +36,7 @@ function ldflags()
     end
     return fl
 end
-
+    
 function ldlibs()
     libname = if isDebug()
         "julia-debug"
@@ -57,6 +49,14 @@ function ldlibs()
         return "\'$(normpath(joinpath(libDir(), "..", "lib", "lib$libname.dll.a")))\'"
     end
 end
+    
+function cflags()
+    fl = "-I $(shell_escape(includeDir()))"
+    if Sys.isunix()
+        fl = fl * " -fPIC"
+    end
+    return fl
+end
 
 # the following two functions are taken from the MATLAB.jl build script and are used to
 # locate MATLAB and its relevant libraries and commands