diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for ogma-language-xlsx
 
+## [1.9.0] - 2025-08-06
+
+* Version bump 1.9.0 (#284).
+
 ## [1.8.0] - 2025-07-13
 
 * Version bump 1.8.0 (#275).
diff --git a/ogma-language-xlsx.cabal b/ogma-language-xlsx.cabal
--- a/ogma-language-xlsx.cabal
+++ b/ogma-language-xlsx.cabal
@@ -32,7 +32,7 @@
 build-type:          Simple
 
 name:                ogma-language-xlsx
-version:             1.8.0
+version:             1.9.0
 homepage:            https://github.com/nasa/ogma
 license:             OtherLicense
 license-file:        LICENSE.pdf
@@ -68,7 +68,7 @@
     , text       >= 1.2.3.1  && < 2.2
     , xlsx       >= 1.1.0    && < 1.2
 
-    , ogma-spec >= 1.8.0 && < 1.9
+    , ogma-spec >= 1.9.0 && < 1.10
 
 
   hs-source-dirs: