diff --git a/.gitignore b/.gitignore
index 738cdf4..011da64 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,7 +8,6 @@
 /.bundle
 
 # Ignore local rvm setup
-.ruby-version
 .ruby-gemset
 
 # Ignore the build directory
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..fa376ed
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+ruby-2.7
diff --git a/Gemfile.lock b/Gemfile.lock
index e047d8d..b033056 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
     exifr (1.3.6)
     fast_blank (1.0.0)
     fastimage (2.1.7)
-    ffi (1.13.1)
+    ffi (1.15.4)
     filey-diff (2.0.0)
     fspath (3.1.2)
     haml (5.1.2)