diff --git a/README.md b/README.md
index d06e7201c..8209bad6c 100644
--- a/README.md
+++ b/README.md
@@ -183,7 +183,7 @@ languages, as long as that language has a package definition in the project dire
 * `glide.lock` file (for `glide`)
 * `vendor/vendor.json` file (for `govendor`)
 * `Gopkg.lock` file (for `dep`)
-* `go.sum` file (for `go mod`)
+* `go.mod` file (for `go mod`)
 * `vendor.conf` file (for `trash`)
 * `yarn.lock` file (for `yarn`)
 * `conanfile.txt` file (for `conan`)
diff --git a/lib/license_finder/package_managers/go_modules.rb b/lib/license_finder/package_managers/go_modules.rb
index 5cbdf5189..4798911d3 100644
--- a/lib/license_finder/package_managers/go_modules.rb
+++ b/lib/license_finder/package_managers/go_modules.rb
@@ -4,7 +4,7 @@
 
 module LicenseFinder
   class GoModules < PackageManager
-    PACKAGES_FILE = 'go.sum'
+    PACKAGES_FILE = 'go.mod'
 
     class << self
       def takes_priority_over
@@ -17,7 +17,7 @@ def prepare_command
     end
 
     def active?
-      sum_files?
+      mod_files?
     end
 
     def current_packages
@@ -41,11 +41,11 @@ def packages_info
       info_output.split("\n")
     end
 
-    def sum_files?
-      sum_file_paths.any?
+    def mod_files?
+      mod_file_paths.any?
     end
 
-    def sum_file_paths
+    def mod_file_paths
       Dir[project_path.join(PACKAGES_FILE)]
     end
 
diff --git a/spec/fixtures/all_pms/go.sum b/spec/fixtures/all_pms/go.mod
similarity index 100%
rename from spec/fixtures/all_pms/go.sum
rename to spec/fixtures/all_pms/go.mod
diff --git a/spec/fixtures/config/go.mod b/spec/fixtures/config/go.mod
new file mode 100644
index 000000000..fd88a8373
--- /dev/null
+++ b/spec/fixtures/config/go.mod
@@ -0,0 +1,6 @@
+module foo
+
+require (
+	gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405
+	gopkg.in/yaml.v2 v2.2.1
+)
diff --git a/spec/fixtures/config/go.sum b/spec/fixtures/config/go.sum
deleted file mode 100644
index 774a9a13b..000000000
--- a/spec/fixtures/config/go.sum
+++ /dev/null
@@ -1,4 +0,0 @@
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/spec/lib/license_finder/package_managers/go_modules_spec.rb b/spec/lib/license_finder/package_managers/go_modules_spec.rb
index 6a564542e..0885a8184 100644
--- a/spec/lib/license_finder/package_managers/go_modules_spec.rb
+++ b/spec/lib/license_finder/package_managers/go_modules_spec.rb
@@ -8,7 +8,7 @@ module LicenseFinder
     it_behaves_like 'a PackageManager'
 
     let(:src_path) { '/workspace/code' }
-    let(:sum_path) { "#{src_path}/go.sum" }
+    let(:mod_path) { "#{src_path}/go.mod" }
     let(:vendor_path) { "#{src_path}/vendor" }
     let(:go_list_string) do
       "foo,,/workspace/code/\ngopkg.in/check.v1,v0.0.0-20161208181325-20d25e280405,"\
@@ -22,7 +22,7 @@ module LicenseFinder
         FakeFS.activate!
 
         FileUtils.mkdir_p(vendor_path)
-        File.write(sum_path, content)
+        File.write(mod_path, content)
 
         allow(SharedHelpers::Cmd).to receive(:run).with("GO111MODULE=on go list -m -f '{{.Path}},{{.Version}},{{.Dir}}' all").and_return(go_list_string)
       end
@@ -33,11 +33,11 @@ module LicenseFinder
 
       let(:content) do
         FakeFS.without do
-          fixture_from('go.sum')
+          fixture_from('go.mod')
         end
       end
 
-      it 'finds all the packages all go.sum files' do
+      it 'finds all the packages all go.mod files' do
         packages = subject.current_packages
 
         expect(packages.length).to eq 2
@@ -65,7 +65,7 @@ module LicenseFinder
             .and_return(go_list_string)
         end
 
-        it 'finds all the packages all go.sum files' do
+        it 'finds all the packages all go.mod files' do
           packages = subject.current_packages
 
           expect(packages.length).to eq 2