1 files changed, 7 insertions, 1 deletions
diff --git a/lib/license/finder/ext/yarn.rb b/lib/license/finder/ext/yarn.rb
index dba096b..f9187ce 100644
--- a/lib/license/finder/ext/yarn.rb
+++ b/lib/license/finder/ext/yarn.rb
@@ -26,7 +26,7 @@ module LicenseFinder
           :yarn, :install,
           '--ignore-engines', '--ignore-scripts',
           '--production'
-        ])
+        ], env: default_env)
       end
     end
 
@@ -90,5 +90,11 @@ module LicenseFinder
 
       [YarnPackage.new(matches['name'], matches['version'], spec_licenses: ['unknown'])]
     end
+
+    def default_env
+      return {} unless shell.custom_certificate_installed?
+
+      { 'NPM_CONFIG_CAFILE' => ENV.fetch('NPM_CONFIG_CAFILE', shell.custom_certificate_path.to_s) }
+    end
   end
 end