diff --git a/.github/workflows/SpellCheck.yml b/.github/workflows/SpellCheck.yml
new file mode 100644
index 00000000..3ccc0e5a
--- /dev/null
+++ b/.github/workflows/SpellCheck.yml
@@ -0,0 +1,13 @@
+iname: Spell Check
+
+ on: [pull_request]
+
+ jobs:
+   typos-check:
+     name: Spell Check with Typos
+     runs-on: ubuntu-latest
+     steps:
+       - name: Checkout Actions Repository
+         uses: actions/checkout@v3
+       - name: Check spelling
+         uses: crate-ci/typos@v1.16.23
diff --git a/.typos.toml b/.typos.toml
new file mode 100644
index 00000000..aa9a6283
--- /dev/null
+++ b/.typos.toml
@@ -0,0 +1,2 @@
+[default.extend-words]
+ numer = "numer"
diff --git a/Project.toml b/Project.toml
index 9d3d09d9..e41d635c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,7 +18,6 @@ ParamPunPam = "3e851597-e36f-45a9-af0a-b7781937992f"
 PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 Primes = "27ebfcd6-29c5-5fa9-bf4b-fb8fc14df3ae"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
-SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"
 
 [weakdeps]
@@ -61,6 +60,7 @@ Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 CPUSummary = "2a0fbf3d-bb9c-48f3-b0a9-814d99fd7ab9"
 ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
+SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b"
 Symbolics = "0c5d862f-8b57-4792-8d23-62f2024744c7"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/ext/ModelingToolkitExt.jl b/ext/ModelingToolkitExt.jl
index 4ca8de85..33447508 100644
--- a/ext/ModelingToolkitExt.jl
+++ b/ext/ModelingToolkitExt.jl
@@ -15,6 +15,7 @@ else
     using ..ModelingToolkit
 end
 
+export mtk_to_si
 export assess_local_identifiability, assess_identifiability, find_identifiable_functions
 
 # ------------------------------------------------------------------------------
diff --git a/src/StructuralIdentifiability.jl b/src/StructuralIdentifiability.jl
index a18c9828..f5a8cb8e 100644
--- a/src/StructuralIdentifiability.jl
+++ b/src/StructuralIdentifiability.jl
@@ -21,7 +21,7 @@ using ParamPunPam: reduce_mod_p!, specialize_mod_p, AbstractBlackboxIdeal
 ParamPunPam.enable_progressbar(false)
 
 # defining a model
-export ODE, @ODEmodel, @DDSmodel, mtk_to_si
+export ODE, @ODEmodel, @DDSmodel
 
 # assessing identifiability
 export assess_local_identifiability, assess_identifiability
diff --git a/test/qa.jl b/test/qa.jl
new file mode 100644
index 00000000..6cf40ac9
--- /dev/null
+++ b/test/qa.jl
@@ -0,0 +1,12 @@
+using StructuralIdentifiability, Aqua
+@testset "Aqua" begin
+     Aqua.find_persistent_tasks_deps(StructuralIdentifiability)
+     Aqua.test_ambiguities(StructuralIdentifiability, recursive = false)
+     Aqua.test_deps_compat(StructuralIdentifiability)
+     Aqua.test_piracies(StructuralIdentifiability,
+         treat_as_own = [])
+     Aqua.test_project_extras(StructuralIdentifiability)
+     Aqua.test_stale_deps(StructuralIdentifiability)
+     Aqua.test_unbound_args(StructuralIdentifiability)
+     Aqua.test_undefined_exports(StructuralIdentifiability)
+end