diff --git a/atom/browser/api/atom_api_session.cc b/atom/browser/api/atom_api_session.cc
index 76bb78b822..9451f22585 100644
--- a/atom/browser/api/atom_api_session.cc
+++ b/atom/browser/api/atom_api_session.cc
@@ -471,13 +471,14 @@ void Session::SetProxy(const mate::Dictionary& options,
   if (!pac_url.empty()) {
     browser_context_->in_memory_pref_store()->SetValue(
         proxy_config::prefs::kProxy,
-        ProxyConfigDictionary::CreatePacScript(pac_url,
-                                               true /* pac_mandatory */),
+        std::make_unique<base::Value>(ProxyConfigDictionary::CreatePacScript(
+            pac_url, true /* pac_mandatory */)),
         WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   } else {
     browser_context_->in_memory_pref_store()->SetValue(
         proxy_config::prefs::kProxy,
-        ProxyConfigDictionary::CreateFixedServers(proxy_rules, bypass_list),
+        std::make_unique<base::Value>(ProxyConfigDictionary::CreateFixedServers(
+            proxy_rules, bypass_list)),
         WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   }
 
diff --git a/atom/browser/browser_process_impl.cc b/atom/browser/browser_process_impl.cc
index dc72cb36d6..0de6a8b383 100644
--- a/atom/browser/browser_process_impl.cc
+++ b/atom/browser/browser_process_impl.cc
@@ -47,19 +47,22 @@ void BrowserProcessImpl::ApplyProxyModeFromCommandLine(
   auto* command_line = base::CommandLine::ForCurrentProcess();
 
   if (command_line->HasSwitch(switches::kNoProxyServer)) {
-    pref_store->SetValue(proxy_config::prefs::kProxy,
-                         ProxyConfigDictionary::CreateDirect(),
-                         WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
+    pref_store->SetValue(
+        proxy_config::prefs::kProxy,
+        std::make_unique<base::Value>(ProxyConfigDictionary::CreateDirect()),
+        WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   } else if (command_line->HasSwitch(switches::kProxyPacUrl)) {
     std::string pac_script_url =
         command_line->GetSwitchValueASCII(switches::kProxyPacUrl);
-    pref_store->SetValue(proxy_config::prefs::kProxy,
-                         ProxyConfigDictionary::CreatePacScript(
-                             pac_script_url, false /* pac_mandatory */),
-                         WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
+    pref_store->SetValue(
+        proxy_config::prefs::kProxy,
+        std::make_unique<base::Value>(ProxyConfigDictionary::CreatePacScript(
+            pac_script_url, false /* pac_mandatory */)),
+        WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   } else if (command_line->HasSwitch(switches::kProxyAutoDetect)) {
     pref_store->SetValue(proxy_config::prefs::kProxy,
-                         ProxyConfigDictionary::CreateAutoDetect(),
+                         std::make_unique<base::Value>(
+                             ProxyConfigDictionary::CreateAutoDetect()),
                          WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   } else if (command_line->HasSwitch(switches::kProxyServer)) {
     std::string proxy_server =
@@ -68,7 +71,8 @@ void BrowserProcessImpl::ApplyProxyModeFromCommandLine(
         command_line->GetSwitchValueASCII(switches::kProxyBypassList);
     pref_store->SetValue(
         proxy_config::prefs::kProxy,
-        ProxyConfigDictionary::CreateFixedServers(proxy_server, bypass_list),
+        std::make_unique<base::Value>(ProxyConfigDictionary::CreateFixedServers(
+            proxy_server, bypass_list)),
         WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   }
 }