diff --git a/package.yaml b/package.yaml
index cc10d02..c396e78 100644
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: language-docker
-version: '9.0.0'
+version: '9.0.1'
 synopsis: Dockerfile parser, pretty-printer and embedded DSL
 description: 'All functions for parsing and pretty-printing Dockerfiles are
   exported through @Language.Docker@. For more fine-grained operations look for
@@ -24,7 +24,7 @@ extra-source-files:
   - README.md
 
 dependencies:
-  - base >=4.13 && <5
+  - base >=4.8 && <5
   - bytestring >=0.10
   - megaparsec >=8.0
   - prettyprinter