diff --git a/.gitignore b/.gitignore
index a61989f..49077f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /oxipng-5.0.0.crate
 /oxipng-5.0.1.crate
 /oxipng-9.0.0.crate
+/oxipng-9.1.1.crate
diff --git a/oxipng-fix-metadata-auto.diff b/oxipng-fix-metadata-auto.diff
index b9e34c7..4b71713 100644
--- a/oxipng-fix-metadata-auto.diff
+++ b/oxipng-fix-metadata-auto.diff
@@ -1,6 +1,6 @@
---- oxipng-9.0.0/Cargo.toml	1970-01-01T00:00:01+00:00
-+++ oxipng-9.0.0/Cargo.toml	2024-03-16T15:10:42.961579+00:00
-@@ -116,7 +116,6 @@
+--- oxipng-9.1.1/Cargo.toml	1970-01-01T00:00:01+00:00
++++ oxipng-9.1.1/Cargo.toml	2024-04-24T19:26:06.475276+00:00
+@@ -150,7 +150,6 @@
  [features]
  binary = [
      "clap",
@@ -8,7 +8,7 @@
      "env_logger",
  ]
  default = [
-@@ -133,13 +132,10 @@
+@@ -167,13 +166,10 @@
  ]
  sanity-checks = ["image"]
  
diff --git a/oxipng-fix-metadata.diff b/oxipng-fix-metadata.diff
deleted file mode 100644
index 1be68c3..0000000
--- a/oxipng-fix-metadata.diff
+++ /dev/null
@@ -1,19 +0,0 @@
---- oxipng-9.0.0/Cargo.toml	1970-01-01T00:00:01+00:00
-+++ oxipng-9.0.0/Cargo.toml	2024-03-16T15:11:05.137897+00:00
-@@ -16,8 +16,15 @@
- version = "9.0.0"
- authors = ["Joshua Holmer <jholmer.in@gmail.com>"]
- exclude = [
-+    ".editorconfig",
-+    ".gitattributes",
-+    ".github/*",
-+    ".gitignore",
-+    ".pre-commit-hooks.yaml",
-+    "Dockerfile",
-+    "index.html",
-+    "scripts/*",
-     "tests/*",
--    "bench/*",
- ]
- description = "A lossless PNG compression optimizer"
- homepage = "https://github.com/shssoichiro/oxipng"
diff --git a/oxipng.1 b/oxipng.1
deleted file mode 100644
index 5971fd6..0000000
--- a/oxipng.1
+++ /dev/null
@@ -1,284 +0,0 @@
-.TH OXIPNG "1" "March 2024" "" "User Commands"
-.SH NAME
-.B oxipng
-\(en Losslessly improve compression of PNG files
-.SH SYNOPSIS
-.B oxipng
-.RI [ OPTIONS ]
-.IR files ...
-.SH OPTIONS
-.SS ARGUMENTS
-.TP
-.IR files ...
-File(s) to compress (use
-.RB \(oq \- \(cq
-for stdin)
-.SS OPTIONS
-.TP
-.BR \-o ,\  \-\-opt\ \fIlevel
-Set the optimization level preset.
-The default level
-.B 2
-is quite fast and provides good compression.
-Lower levels are faster, higher levels provide better compression,
-though with increasingly diminishing returns.
-.RS
-.TP
-.B 0\ \[rA] \-\-zc\ 5\ \-\-fast
-(1 trial, determined heuristically)
-.TP
-.B 1\ \[rA] \-\-zc\ 10\ \-\-fast
-(1 trial, determined heuristically)
-.TP
-.B 2\ \[rA] \-\-zc\ 11\ \-f\ 0,1,6,7\ \-\-fast
-(4 fast trials, 1 main trial)
-.TP
-.B 3\ \[rA] \-\-zc\ 11\ \-f\ 0,7,8,9
-(4 trials)
-.TP
-.B 4\ \[rA] \-\-zc\ 12\ \-f\ 0,7,8,9
-(4 trials)
-.TP
-.B 5\ \[rA] \-\-zc\ 12\ \-f\ 0,1,2,5,6,7,8,9
-(8 trials)
-.TP
-.B 6\ \[rA] \-\-zc\ 12\ \-f\ 0-9
-(10 trials)
-.TP
-.B max\ \[rA]
-(stable alias for the max level)
-.RE
-.IP
-Manually specifying a compression option
-.RB ( zc ,
-.BR f ,
-etc.) will override the optimization preset,
-regardless of the order you write the arguments.
-.IP
-[default:
-.BR 2 ]
-.TP
-.BR \-r ,\  \-\-recursive
-When directories are given as input,
-traverse the directory trees and optimize all PNG files found
-(files with \(lq.png\(rq or \(lq.apng\(rq extension).
-.TP
-.B \-\-dir\ \fIdirectory
-Write output file(s) to
-.IR directory .
-If the directory does not exist, it will be created.
-Note that this will not preserve the directory structure
-of the input files when used with
-.BR \-\-recursive .
-.TP
-.B \-\-out\ \fIfile
-Write output file to
-.I file
-.TP
-.B \-\-stdout
-Write output to stdout
-.TP
-.BR \-p ,\  \-\-preserve
-Preserve file permissions and timestamps if possible
-.TP
-.BR \-P ,\  \-\-pretend
-Do not write any files, only show compression results
-.TP
-.B \-s
-Strip safely-removable chunks, same as
-.B \-\-strip\ safe
-.TP
-.BR \-\-strip\ \fImode
-Strip metadata chunks, where
-.I mode
-is one of:
-.RS
-.TP
-.B safe
-Strip all non-critical chunks, except for the following:
-cICP, iCCP, sRGB, pHYs, acTL, fcTL, fdAT
-.TP
-.B all
-Strip all non-critical chunks
-.TP
-.I list
-Strip chunks in the comma-separated list, e.g.\:
-.B bKGD,cHRM
-.RE
-.IP
-.IR CAUTION :
-.B all
-will convert APNGs to standard PNGs.
-.IP          
-Note that
-.BR bKGD ,
-.B sBIT
-and
-.B hIST
-will be forcibly stripped if the color type or bit depth is changed,
-regardless of any options set.
-.TP
-.BR \-\-keep\ \fIlist
-Strip all metadata except in the comma-separated list
-.TP
-.BR \-a ,\  \-\-alpha
-Perform additional optimization on images with an alpha channel,
-by altering the color values of fully transparent pixels.
-This is generally recommended for better compression,
-but take care as while this is \(lqvisually lossless\(rq,
-it is technically a lossy transformation
-and may be unsuitable for some applications.
-.TP
-.BR \-i ,\  \-\-interlace\ \fItype
-Set the PNG interlacing type, where
-.I type
-is one of:
-.RS
-.TP
-.B 0
-Remove interlacing from all images that are processed
-.TP
-.B 1
-Apply Adam7 interlacing on all images that are processed
-.TP
-.B keep
-Keep the existing interlacing type of each image
-.RE
-.IP
-Note that interlacing can add 25-50% to the size of an optimized image.
-Only use it if you believe the benefits outweigh the costs for your use case.
-.IP
-[default:
-.BR 0 ]
-.TP
-.B \-\-scale16
-Forcibly reduce images with 16 bits per channel to 8 bits per channel.
-This is a lossy operation but can provide significant savings
-when you have no need for higher depth.
-Reduction is performed by scaling the values such that,
-e.g. 0x00FF is reduced to 0x01 rather than 0x00.
-.IP          
-Without this flag, 16-bit images will only be reduced in depth
-if it can be done losslessly.
-.TP
-.BR \-v ,\  \-\-verbose ...
-Run in verbose mode (use twice to increase verbosity)
-.TP
-.BR \-q ,\  \-\-quiet
-Run in quiet mode
-.TP
-.BR \-f ,\  \-\-filers\ \fIlist
-Perform compression trials with each of the given filter types.
-You can specify a comma-separated list, or a range of values.
-E.g.\:
-.B \-f\ 0\-3
-is the same as
-.BR \-f\ 0,1,2,3 .
-.IP
-PNG delta filters (apply the same filter to every line)
-.RS
-.TP
-.B 0\ \[rA] None
-(recommended to always include this filter)
-.TP
-.B 1\ \[rA] Sub
-.TP
-.B 2\ \[rA] Up
-.TP
-.B 3\ \[rA] Average
-.TP
-.B 4\ \[rA] Paeth
-.RE
-.IP
-Heuristic strategies (try to find the best delta filter for each line)
-.RS
-.TP
-.B 5\ \[rA] MinSum
-Minimum sum of absolute differences
-.TP
-.B 6\ \[rA] Entropy
-Highest Shannon entropy
-.TP
-.B 7\ \[rA] Bigrams
-Lowest count of distinct bigrams
-.TP
-.B 8\ \[rA] BigEnt
-Highest Shannon entropy of bigrams
-.TP
-.B 9\ \[rA] Brute
-Smallest compressed size (slow)
-.RE
-.IP
-The default value depends on the optimization level preset.
-.TP
-.B \-\-fast
-Perform a fast compression evaluation of each enabled filter,
-followed by a single main compression trial of the best result.
-Recommended if you have more filters enabled than CPU cores.
-.TP
-.B \-\-zc\ \fIlevel
-Deflate compression level (1\-12) for main compression trials.
-The levels here are defined by the libdeflate compression library.
-.IP
-The default value depends on the optimization level preset.
-.TP
-.B \-\-nb
-Do not change bit depth
-.TP
-.B \-\-nc
-Do not change color type
-.TP
-.B \-\-np
-Do not change color palette
-.TP
-.B \-\-ng
-Do not change to or from grayscale
-.TP
-.B \-\-nx
-Do not perform any transformations and do not deinterlace by default.
-.TP
-.B \-\-nz
-Do not recompress IDAT unless required due to transformations.
-Recompression of other compressed chunks (such as iCCP) will also be disabled.
-Note that the combination of
-.B \-\-nx
-and
-.B \-\-nz
-will fully disable all optimization.
-.TP
-.B \-\-fix
-Do not perform checksum validation of PNG chunks.
-This may allow some files with errors to be processed successfully.
-.TP
-.B \-\-force
-Write the output even if it is larger than the input
-.TP
-.BR \-Z ,\  \-\-zopfli
-Use the much slower but stronger Zopfli compressor
-for main compression trials.
-Recommended use is with
-.B \-o\ max
-and
-.BR \-\-fast .
-.TP
-.B \-\-timeout\ \fIsecs
-Maximum amount of time, in seconds, to spend on optimizations.
-Oxipng will check the timeout
-before each transformation or compression trial,
-and will stop trying to optimize the file if the timeout is exceeded.
-Note that this does not cut short any operations that are already in progress,
-so it is currently of limited effectiveness
-for large files with high compression levels.
-.TP
-.BR \-t ,\  \-\-threads\ \fInum
-Set number of threads to use
-[default: num CPU cores]
-.TP
-.BR \-h ,\  \-\-help
-Print help (see a summary with
-.BR \-h )
-.TP
-.BR \-V ,\  \-\-version
-Print version
-.SH "SEE ALSO"
-.BR OPTIPNG (1)
diff --git a/rust-oxipng.spec b/rust-oxipng.spec
index 9e2f3b3..75c0f91 100644
--- a/rust-oxipng.spec
+++ b/rust-oxipng.spec
@@ -4,24 +4,15 @@
 %global crate oxipng
 
 Name:           rust-oxipng
-Version:        9.0.0
+Version:        9.1.1
 Release:        %autorelease
 Summary:        Lossless PNG compression optimizer
 
 License:        MIT
 URL:            https://crates.io/crates/oxipng
 Source:         %{crates_source}
-# # * Man page hand-written for Fedora in groff_man(7) format based on --help
-# # * See “Add man page for the command-line utility”
-# #   https://github.com/shssoichiro/oxipng/issues/526, and particularly
-# #   https://github.com/shssoichiro/oxipng/issues/526#issuecomment-2002014746.
-Source10:       oxipng.1
 # Automatically generated patch to strip dependencies and normalize metadata
 Patch:          oxipng-fix-metadata-auto.diff
-# Manually created patch for downstream crate metadata changes
-# * Omit unnecessary files from the crate, as in “Exclude more files from the
-#   published crate” https://github.com/shssoichiro/oxipng/pull/591
-Patch:          oxipng-fix-metadata.diff
 
 BuildRequires:  cargo-rpm-macros >= 24
 
@@ -36,15 +27,13 @@ Summary:        %{summary}
 # Apache-2.0 OR MIT
 # Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT
 # MIT
-# MIT OR Apache-2.0
-# Unlicense OR MIT
+# MIT OR Apache-2.0 (duplicate)
 # Zlib OR Apache-2.0 OR MIT
 License:        %{shrink:
                 Apache-2.0 AND
                 (Apache-2.0 OR MIT) AND
                 (Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT) AND
                 MIT AND
-                (Unlicense OR MIT) AND
                 (Zlib OR Apache-2.0 OR MIT)
                 }
 # LICENSE.dependencies contains a full license breakdown
@@ -234,7 +223,9 @@ use the "zopfli" feature of the "%{crate}" crate.
 
 %install
 %cargo_install
-install -t %{buildroot}%{_mandir}/man1 -D -p -m 0644 '%{SOURCE10}'
+mansrc='target/release/assets/oxipng.1'
+mandest='%{buildroot}%{_mandir}/man1'
+install -t "${mandest}" -D -p -m 0644 "${mansrc}"
 
 %if %{with check}
 %check
diff --git a/rust2rpm.toml b/rust2rpm.toml
index 199a5be..ffd8b6d 100644
--- a/rust2rpm.toml
+++ b/rust2rpm.toml
@@ -1,16 +1,11 @@
 [package]
-cargo-toml-patch-comments = [
-    "Omit unnecessary files from the crate, as in “Exclude more files from the published crate” https://github.com/shssoichiro/oxipng/pull/591",
-]
-extra-files = ["%{_mandir}/man1/oxipng.1*"]
-
-[[package.extra-sources]]
-number = 10
-file = "oxipng.1"
-comments = [
-    "Man page hand-written for Fedora in groff_man(7) format based on --help",
-    "See “Add man page for the command-line utility” https://github.com/shssoichiro/oxipng/issues/526, and particularly https://github.com/shssoichiro/oxipng/issues/526#issuecomment-2002014746.",
+extra-files = [
+  "%{_mandir}/man1/oxipng.1*",
 ]
 
 [scripts.install]
-post = ["install -t %{buildroot}%{_mandir}/man1 -D -p -m 0644 '%{SOURCE10}'"]
+post = [
+  "mansrc='target/release/assets/oxipng.1'",
+  "mandest='%{buildroot}%{_mandir}/man1'",
+  "install -t \"${mandest}\" -D -p -m 0644 \"${mansrc}\"",
+]
diff --git a/sources b/sources
index a0dcda7..aeb7486 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (oxipng-9.0.0.crate) = 42ec6c4abfce4a12feef9f43e3945c9dd822079eb434fd24c6dedb26fa3c1d962c462b1f3b5dbedcc53dc311b9ee018270986e0ca080e4249af02f8152338fd4
+SHA512 (oxipng-9.1.1.crate) = 067c6a02523bed7dae44df8aba7fddd4989f2c841c6addb9f237f756ad1dc21a7cbf7abb76539b4a3e759f7c63cc33273dff7519a6301f4f0c78c66502f0d372