diff --git a/main.jl b/main.jl
index e301351..a519743 100644
--- a/main.jl
+++ b/main.jl
@@ -7,7 +7,7 @@ Pkg.add(PackageSpec(name="CoverageTools"))
 using CoverageTools
 
 directories = get(ENV, "INPUT_DIRECTORIES", "src,ext")
-dirs = filter!(!isempty, split(directories, ","))
+dirs = filter!(!isempty, strip.(split(directories, ",")))
 for dir in dirs
     if dir == "ext"
         continue  # Silently skip this directory