diff --git a/windows/README.txt b/windows/README.txt
index 6ea7c46c3de832e57886861c0a4500b2232431f4..93e591786918710f73087da58c53d98a4b3c4ca0 100644
--- a/windows/README.txt
+++ b/windows/README.txt
@@ -52,10 +52,10 @@ Using Dynare with Octave
 Dynare also works on top of GNU Octave, a free clone of MATLAB® (see
 <https://www.octave.org>).
 
-This version of Dynare is compiled for Octave 8.4.0 (MinGW, 64-bit),
+This version of Dynare is compiled for Octave 9.1.0 (MinGW, 64-bit),
 and may not work with other versions of Octave. The recommended version of
 Octave can be downloaded at:
-  https://ftpmirror.gnu.org/gnu/octave/windows/octave-8.4.0-w64-installer.exe
+  https://ftpmirror.gnu.org/gnu/octave/windows/octave-9.1.0-w64-installer.exe
 
 Every time you run Octave, you should type the following command (assuming that
 you have installed Dynare at the standard location, and replacing ‘x.y’ by
diff --git a/windows/deps/versions.mk b/windows/deps/versions.mk
index f665fec74652dc398cea2a5ccbf85f2e97da1bc8..f3d19d8a342a3c0e26ae38c3e36883ed3856c739 100644
--- a/windows/deps/versions.mk
+++ b/windows/deps/versions.mk
@@ -1,7 +1,7 @@
 SLICOT_VERSION = 5.9
 X13AS_VERSION = 1-1-b60
 
-OCTAVE_VERSION = 8.4.0
+OCTAVE_VERSION = 9.1.0
 OCTAVE_W64_BUILD =
 
 MATLAB64_VERSION = 20231122
diff --git a/windows/dynare.nsi b/windows/dynare.nsi
index 87bdcdd92ab703ffba6dcb78aa00c1b05e324018..72eb754d2ce816a119d6bdb1e11def9fb6e9efad 100644
--- a/windows/dynare.nsi
+++ b/windows/dynare.nsi
@@ -100,7 +100,7 @@ Section "MinGW compiler for MATLAB 64-bit"
  File /r deps\mingw64\*
 SectionEnd
 
-Section "MEX files for Octave 8.4.0 (64-bit)"
+Section "MEX files for Octave 9.1.0 (64-bit)"
  SetOutPath $INSTDIR\mex\octave\win64
  File ..\build-win-octave\*.mex
 SectionEnd