diff --git a/bishbosh.cabal b/bishbosh.cabal
--- a/bishbosh.cabal
+++ b/bishbosh.cabal
@@ -16,7 +16,7 @@
 -- along with BishBosh.  If not, see <http://www.gnu.org/licenses/>.
 
 Name:		bishbosh
-Version:	0.1.3.0
+Version:	0.1.3.1
 Copyright:	(C) 2018 Dr. Alistair Ward
 License:	GPL-3.0-or-later
 License-file:	LICENSE
@@ -302,7 +302,7 @@
 
     Build-depends:
         array		^>= 0.5.1.1,
-        deepseq		^>= 1.4.1,
+        deepseq		>= 1.4.3,
         extra		^>= 1.7.4,
         factory		^>= 0.3.1,
         hxt		^>= 9.3.1,
diff --git a/bishbosh.spec b/bishbosh.spec
--- a/bishbosh.spec
+++ b/bishbosh.spec
@@ -24,7 +24,7 @@
 
 Summary:	BishBosh is a chess-game.
 Name:		bishbosh
-Version:	0.1.3.0
+Version:	0.1.3.1
 Release:	1
 License:	GPLv3
 # From '/usr/share/doc/packages/rpm/GROUPS'.
diff --git a/changelog.markdown b/changelog.markdown
--- a/changelog.markdown
+++ b/changelog.markdown
@@ -162,3 +162,6 @@
 	+ Relocated colour-related modules from **BishBosh/Attribute/** to **BishBosh/Colour/**.
 	+ Re-ordered the parameters of functions which access record-structures, to make the record the first parameter; cf. those that mutate the record-structure, which receive it last.
 
+## 0.1.3.1
+* Increased minimum version for package **deepseq**, to access function **rwhnf**.
+