diff --git a/mupdf-1.22.2-source.tar.gz b/mupdf-1.22.2-source.tar.gz
deleted file mode 100644
index b511f5b..0000000
--- a/mupdf-1.22.2-source.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:54c66af4e6ef8cea9867cc0320ef925d561b42919ea0d4f89db5c9ef485bbeb7
-size 57541621
diff --git a/mupdf-1.23.3-source.tar.gz b/mupdf-1.23.3-source.tar.gz
new file mode 100644
index 0000000..2464d4c
--- /dev/null
+++ b/mupdf-1.23.3-source.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1ef9a6409bc0a3271586e1b16f78eb156a579521cd212a124b57c4da8b940aad
+size 55144800
diff --git a/mupdf-no-strip.patch b/mupdf-no-strip.patch
index 64917c7..3d7cde1 100644
--- a/mupdf-no-strip.patch
+++ b/mupdf-no-strip.patch
@@ -1,15 +1,11 @@
-Index: mupdf-1.22.1-source/Makerules
-===================================================================
---- mupdf-1.22.1-source.orig/Makerules
-+++ mupdf-1.22.1-source/Makerules
-@@ -83,8 +83,8 @@ ifeq ($(build),debug)
-   CFLAGS += -pipe -g
+--- mupdf-1.23.3-source/Makerules.orig	2023-09-20 07:55:15.822969071 +0200
++++ mupdf-1.23.3-source/Makerules	2023-09-20 07:55:39.019862276 +0200
+@@ -93,7 +93,7 @@
    LDFLAGS += -g
  else ifeq ($(build),release)
--  CFLAGS += -pipe -O2 -DNDEBUG -fomit-frame-pointer
+   CFLAGS += -pipe -O2 -DNDEBUG
 -  LDFLAGS += $(LDREMOVEUNREACH) -Wl,-s
-+  CFLAGS += -pipe -O2 -DNDEBUG
 +  LDFLAGS += $(LDREMOVEUNREACH)
  else ifeq ($(build),small)
-   CFLAGS += -pipe -Os -DNDEBUG -fomit-frame-pointer
+   CFLAGS += -pipe -Os -DNDEBUG
    LDFLAGS += $(LDREMOVEUNREACH) -Wl,-s
diff --git a/mupdf.changes b/mupdf.changes
index 4835008..cb54aad 100644
--- a/mupdf.changes
+++ b/mupdf.changes
@@ -1,3 +1,34 @@
+-------------------------------------------------------------------
+Wed Sep 20 05:56:12 UTC 2023 - Paolo Stivanin <info@paolostivanin.com>
+
+- Update to 1.23.3:
+  New features:
+    + New WASM library with same API as mutool run and Java, for both browser and Node environments.
+    + Support CropBox, TrimBox, BleedBox, and ArtBox in PDF tools and viewers.
+    + PhotoShop PSD image support.
+    + mupdf-gl: Custom ICC display profile support.
+    + mutool poster: Option to split in RTL direction.
+  Fixes:
+    + EPUB: Fix table cell height calculations.
+    + EPUB: Inherit table cell background color from table row.
+    + EPUB: Support files with partial encryption (only read unencrypted parts).
+    + EPUB: Support files with incorrect directory prefixes.
+    + TIFF: Stability improvements.
+    + MOBI: Stability improvements.
+    + PDF: Support old style border dash patterns.
+    + PDF: Support GoToR links to remote PDF documents.
+    + PDF: Improve link parsing and creation.
+    + ZIP: Improve unicode file name handling.
+    + Fall back to unhinted fonts if hints are broken.
+    + Recognize document types by sniffing contents (don't need to rely on mimetype or file extension).
+  NEW APIs:
+    + More PDF document permission flags.
+    + Tweaked exception error logging.
+    + pdf_minimize_document to squeeze amount of memory used by an open document.
+  Incompatible changes:
+    + pdf_field_name renamed to pdf_load_field_name.
+    + mutool run: Changed many methods to match Java and new WASM library.
+
 -------------------------------------------------------------------
 Tue Jun 20 07:03:54 UTC 2023 - Paolo Stivanin <info@paolostivanin.com>
 
diff --git a/mupdf.spec b/mupdf.spec
index cebe9f4..58f455f 100644
--- a/mupdf.spec
+++ b/mupdf.spec
@@ -18,7 +18,7 @@
 
 
 Name:           mupdf
-Version:        1.22.2
+Version:        1.23.3
 Release:        0
 Summary:        PDF and XPS Viewer and Parser and Rendering Library
 License:        AGPL-3.0-or-later