diff --git a/README.md b/README.md
index b58f523..23c619f 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ Github Action for building executables with PyInstaller
 To build your application, you need to specify where your source code is via the `path` argument, this defaults to `src`.
 
 The source code directory should have your `.spec` file that PyInstaller generates. If you don't have one, you'll need to run PyInstaller once locally to generate it.
+Also if you have another program `.spec` file you can set specific pyinstaller `.spec` file by `spec: <YOUR_SPEC_FILE_NAME>`
 
 If the `src` folder has a `requirements.txt` file, the packages will be installed into the environment before PyInstaller runs.
 
diff --git a/action.yml b/action.yml
index 6684dde..44af939 100644
--- a/action.yml
+++ b/action.yml
@@ -6,7 +6,7 @@ branding:
   color: 'blue'
 inputs:
   path:
-    description: 'Directory containing source code & .spec file (optional requirements.txt).'
+    description: 'Directory containing source code (optional requirements.txt).'
     required: True
     default: src
   pypi_url:
@@ -17,6 +17,10 @@ inputs:
     description: 'Specify a custom URL for PYPI Index'
     required: False
     default: https://pypi.python.org/simple
+  spec:
+    description: 'Specify a file path for .spec file'
+    required: False
+    default: ""
 outputs:
   output:
     description: 'The output of PyInstaller'
@@ -27,4 +31,5 @@ runs:
   args:
     - ${{ inputs.path }}
     - ${{ inputs.pypi_url }}
-    - ${{ inputs.pypi_index_url }}
\ No newline at end of file
+    - ${{ inputs.pypi_index_url }}
+    - ${{ inputs.spec }}
diff --git a/entrypoint.sh b/entrypoint.sh
index 3acaab8..06ef8a0 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -17,6 +17,10 @@ PYPI_INDEX_URL=$3
 
 WORKDIR=${SRCDIR:-/src}
 
+SPEC_FILE=${4:-*.spec}
+
+python -m pip install --upgrade pip wheel setuptools
+
 #
 # In case the user specified a custom URL for PYPI, then use
 # that one, instead of the default one.
@@ -44,7 +48,7 @@ fi # [ -f requirements.txt ]
 
 
 # if [[ "$@" == "" ]]; then
-pyinstaller --clean -y --dist ./dist/windows --workpath /tmp *.spec
+pyinstaller --clean -y --dist ./dist/windows --workpath /tmp $SPEC_FILE
 chown -R --reference=. ./dist/windows
 # else
     # sh -c "$@"