diff --git a/.cirrus.yml b/.cirrus.yml
index 123d7b8..1d977ce 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -15,7 +15,7 @@ task:
     # See https://github.com/anarazel/pg-vm-images/blob/main/packer/openbsd.pkrvars.hcl
     image: family/pg-ci-openbsd-vanilla
     platform: openbsd
-  install_script: pkg_add ghc cabal-install git autoconf-2.71
+  install_script: pkg_add ghc cabal-install git autoconf-2.71p0
   script:
     - export AUTOCONF_VERSION=2.71
     - export CABAL_DIR=/tmp/.cabal
diff --git a/unix.cabal b/unix.cabal
index 7df7270..941a702 100644
--- a/unix.cabal
+++ b/unix.cabal
@@ -79,7 +79,7 @@ library
     build-depends:
         base        >= 4.12.0.0  && < 4.23,
         bytestring  >= 0.9.2     && < 0.13,
-        time        >= 1.9.1     && < 1.15
+        time        >= 1.9.1     && < 1.16
 
     if flag(os-string)
       build-depends: filepath >= 1.5.0.0, os-string >= 2.0.0
@@ -187,6 +187,11 @@ test-suite unix-tests
       build-depends: filepath >= 1.5.0.0, os-string >= 2.0.0
     else
       build-depends: filepath >= 1.4.100.0 && < 1.5.0.0
+
+    -- https://github.com/haskellari/splitmix/issues/101
+    if os(openbsd)
+      build-depends: splitmix < 0.1.3 || > 0.1.3.1
+
     ghc-options: -Wall -with-rtsopts=-V0
 
 test-suite FdReadBuf001