diff --git a/.github/workflows/format_check.yml b/.github/workflows/format_check.yml
index 45a41cf8..c2665cb3 100644
--- a/.github/workflows/format_check.yml
+++ b/.github/workflows/format_check.yml
@@ -14,12 +14,12 @@ jobs:
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Format check
         shell: julia --color=yes {0}
         run: |
           using Pkg
-          Pkg.add(PackageSpec(name="JuliaFormatter", version="1"))
+          Pkg.add(PackageSpec(name="JuliaFormatter", version="2"))
           using JuliaFormatter
           format("src", verbose=true)
           format("test", verbose=true)
diff --git a/src/det.jl b/src/det.jl
index 66cd8dce..f39d77f6 100644
--- a/src/det.jl
+++ b/src/det.jl
@@ -2,8 +2,8 @@ function LinearAlgebra.det(M::Matrix{<:AbstractPolynomialLike})
     m = size(M)[1]
     if m > 2
         return sum(
-            (-1)^(i - 1) * M[i, 1] * LinearAlgebra.det(M[1:end.!=i, 2:end]) for
-            i in 1:m
+            (-1)^(i - 1) * M[i, 1] * LinearAlgebra.det(M[1:end .!= i, 2:end])
+            for i in 1:m
         )
     elseif m == 2
         return M[1, 1] * M[2, 2] - M[2, 1] * M[1, 2]