diff --git a/judges/dimensions-of-terrain/total_commits.rb b/judges/dimensions-of-terrain/total_commits.rb
index 6d3a7e5fd0..58746f5e4f 100644
--- a/judges/dimensions-of-terrain/total_commits.rb
+++ b/judges/dimensions-of-terrain/total_commits.rb
@@ -18,7 +18,7 @@ def total_commits(_fact)
   repos = []
   Fbe.unmask_repos do |repo|
     json = Fbe.octo.repository(repo)
-    next if json[:size].zero?
+    next if json[:size].nil? || json[:size].zero?
     repos << [*repo.split('/'), json[:default_branch]]
   end
   commits = Fbe.github_graph.total_commits(repos:).sum { _1['total_commits'] } unless repos.empty?
diff --git a/judges/dimensions-of-terrain/total_contributors.rb b/judges/dimensions-of-terrain/total_contributors.rb
index 1a72624fb8..eb638c92dc 100644
--- a/judges/dimensions-of-terrain/total_contributors.rb
+++ b/judges/dimensions-of-terrain/total_contributors.rb
@@ -20,7 +20,8 @@
 def total_contributors(_fact)
   contributors = Set.new
   Fbe.unmask_repos do |repo|
-    next if Fbe.octo.repository(repo)[:size].zero?
+    json = Fbe.octo.repository(repo)
+    next if json[:size].nil? || json[:size].zero?
     Fbe.octo.contributors(repo).each do |contributor|
       contributors << contributor[:id]
     end
diff --git a/judges/dimensions-of-terrain/total_files.rb b/judges/dimensions-of-terrain/total_files.rb
index f075cb5a8c..feb2748855 100644
--- a/judges/dimensions-of-terrain/total_files.rb
+++ b/judges/dimensions-of-terrain/total_files.rb
@@ -20,7 +20,7 @@ def total_files(_fact)
   files = 0
   Fbe.unmask_repos do |repo|
     repo_info = Fbe.octo.repository(repo)
-    next if repo_info[:size].zero?
+    next if repo_info[:size].nil? || repo_info[:size].zero?
     Fbe.octo.tree(repo, repo_info[:default_branch], recursive: true).then do |json|
       files += json[:tree].count { |item| item[:type] == 'blob' }
     end
diff --git a/test/judges/test-dimensions-of-terrain.rb b/test/judges/test-dimensions-of-terrain.rb
index 20b3b948ff..70b49f715a 100644
--- a/test/judges/test-dimensions-of-terrain.rb
+++ b/test/judges/test-dimensions-of-terrain.rb
@@ -274,8 +274,16 @@ def test_total_issues_and_pull_requests
   def test_total_commits
     WebMock.disable_net_connect!
     fb = Factbase.new
-    load_it('dimensions-of-terrain', fb,
-            Judges::Options.new({ 'repositories' => 'foo/foo,yegor256/empty-repo', 'testing' => true }))
+    load_it(
+      'dimensions-of-terrain',
+      fb,
+      Judges::Options.new(
+        {
+          'repositories' => 'foo/foo,yegor256/empty-repo,yegor256/nil-size-repo',
+          'testing' => true
+        }
+      )
+    )
     f = fb.query("(eq what 'dimensions-of-terrain')").each.first
     assert_equal(1484, f.total_commits)
   end