diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..ab36593
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,18 @@
+# Auto-detect text files, ensure they use LF.
+*       text=auto eol=lf
+
+# These files are always considered text and should use LF.
+# See core.whitespace @ http://git-scm.com/docs/git-config for whitespace flags.
+*.php   text eol=lf whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4 diff=php
+*.json  text eol=lf whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4
+
+# Ignore these files in GitHub dists and `git archive` actions.
+/.gitattributes export-ignore
+/.github export-ignore
+/.gitignore export-ignore
+/.php-cs-fixer.php export-ignore
+/phpstan.neon.dist export-ignore
+/phpstan-baseline.neon export-ignore
+/phpunit.xml.dist export-ignore
+/tests export-ignore
+/gh-md-toc export-ignore
diff --git a/phpstan.neon b/phpstan.neon.dist
similarity index 100%
rename from phpstan.neon
rename to phpstan.neon.dist