diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for net-spider
 
+## 0.4.3.4  -- 2020-06-21
+
+* Confirm test with `base-4.13` and `base-4.14`.
+
 ## 0.4.3.3  -- 2020-06-06
 
 * Confirm test with `doctest-0.17`.
diff --git a/net-spider.cabal b/net-spider.cabal
--- a/net-spider.cabal
+++ b/net-spider.cabal
@@ -1,5 +1,5 @@
 name:                   net-spider
-version:                0.4.3.3
+version:                0.4.3.4
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -53,7 +53,7 @@
                         NetSpider.Spider.Internal.Spider,
                         NetSpider.Queue,
                         NetSpider.Query.Internal
-  build-depends:        base >=4.10.1 && <4.13,
+  build-depends:        base >=4.10.1 && <4.15,
                         time >=1.8.0.2 && <1.10,
                         vector >=0.12.0.1 && <0.13,
                         greskell-websocket >=0.1.1 && <0.2,