diff --git a/README.md b/README.md
index c9afd9d..79df292 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,24 @@
 
 # qPDF Decode
 
-Shell scripts for easier decrypting PDF files with a password using
-[QPDF](https://qpdf.sourceforge.io/).
+[<img align="right" width="96" alt="Application icon depicting a white unlocked padlock on a red sheet of paper"
+title="Link to qPDF Decode main repo"
+src="img/qpdf-decode-gui.svg">](https://git.disroot.org/daltux/qpdf-decode)
+
+Permanent decryption of a single PDF file using a password.
+
+Main repository: <https://git.disroot.org/daltux/qpdf-decode>
 
 ## Dependencies
 
-- **[QPDF](https://qpdf.sourceforge.io/)** (tested on version 11.6.3)
+- **[QPDF](https://qpdf.sourceforge.io/)** tool
+	- versions tested: 11.6.3, 8.0.2
 - A POSIX-compliant Shell (`/bin/sh`)
 	- tested on [Debian GNU/Linux](https://debian.org) and Ubuntu with:
 		- [`dash`](https://manpages.debian.org/testing/dash/dash.1.en.html) 0.5.12, 0.5.8
-		- [`posh`](https://manpages.debian.org/testing/posh/posh.1.en.html) 0.14.1
+		- [`posh`](https://manpages.debian.org/testing/posh/posh.1.en.html) 0.14.1, 0.13.1
 		- [`busybox sh`](http://www.busybox.net) 1.36.1
-- For the graphic user interface:
+- For the graphic user interface (`qpdf-decode-gui`):
 	- [YAD](https://github.com/v1cont/yad)
 		- tested on 0.40.0 from Debian, Xfce 4.18, GTK+ 3.24.38
 		- tested on 0.38.2 from Ubuntu 18.04
diff --git a/img/qpdf-decode-gui.svg b/img/qpdf-decode-gui.svg
new file mode 100644
index 0000000..053b146
--- /dev/null
+++ b/img/qpdf-decode-gui.svg
@@ -0,0 +1,36 @@
+<svg version="1" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+	<title>qpdf-decode-gui.svg</title>
+	<path d="m28 5v10c0 1.1046 0.89543 2 2 2h10z" opacity=".2"/>
+	<path d="m10 5c-1.108 0-2 0.892-2 2v36c0 1.108 0.892 2 2 2h28c1.108 0 2-0.892 2-2v-26l-11-1-1-11z" opacity=".2"/>
+	<path d="m10 4c-1.108 0-2 0.892-2 2v36c0 1.108 0.892 2 2 2h28c1.108 0 2-0.892 2-2v-26l-11-1-1-11z" fill="#c03630"/>
+	<path d="m10 4c-1.108 0-2 0.892-2 2v1c0-1.108 0.892-2 2-2h18l11 11h1l-12-12z" fill="#fff" opacity=".1"/>
+	<path d="m28 4v10c0 1.1046 0.89543 2 2 2h10z" fill="#f36961"/>
+	<g transform="matrix(.65949 0 0 .65949 .21066 -4.9356)">
+		<path d="m22.78 17.18c-0.46126 0-0.89261 0.22577-0.99696 0.59841-0.38752 1.4286 0.0462 3.6379 0.76956 6.3906l-0.21821 0.53294c-0.55387 1.3501-1.2462 2.6947-1.855 3.8879-2.5135 4.918-4.4689 7.5715-5.7727 7.7574l-5e-3 -0.054c-0.0283-0.61346 1.1038-2.1951 2.6382-3.4526 0.16005-0.12944 0.84304-0.79021 0.84304-0.79021s-0.92191 0.48667-1.129 0.61218c-1.9228 1.1477-2.8796 2.2976-3.0356 3.0609-0.0463 0.22672-0.0166 0.5057 0.18375 0.62024l0.4916 0.24694c1.3384 0.66995 2.9841-1.0916 5.172-4.9262 2.2264-0.73036 5.0043-1.418 7.5335-1.7906 2.264 1.2936 4.861 1.9095 5.8588 1.6436 0.18987-0.0502 0.3896-0.19924 0.4916-0.33652 0.08-0.12631 0.19183-0.63172 0.19183-0.63172s-0.18773 0.25547-0.3423 0.33078c-0.63152 0.29811-2.6253-0.19924-4.6712-1.2002 1.769-0.18828 3.2427-0.19554 4.0303 0.0562 1.0003 0.3193 1.0011 0.64659 0.98778 0.71326 0.0135-0.0549 0.0583-0.27418 0.0528-0.36753-0.0227-0.24006-0.0967-0.45443-0.27795-0.63172-0.37027-0.36479-1.2845-0.54862-2.5303-0.56509-0.939-0.0102-2.065 0.072-3.2872 0.24694-0.56012-0.32164-1.1512-0.67522-1.6195-1.113-1.1877-1.1093-2.1832-2.6494-2.8014-4.376 0.0422-0.16553 0.0826-0.32727 0.11944-0.49045 0.17183-0.77271 0.29517-3.3274 0.29517-3.3274s-0.48934 1.9192-0.56622 2.2087c-0.0494 0.18357-0.11086 0.3795-0.18147 0.58347-0.375-1.3179-0.56509-2.5952-0.56509-3.564 0-0.27379 0.0235-0.80656 0.10105-1.2278 0.0378-0.30045 0.1466-0.45647 0.2596-0.53179 0.22357 0.0542 0.47383 0.39708 0.73509 0.97054 0.22435 0.4958 0.21017 1.07 0.21017 1.4254 0 0 0.24061-0.87999 0.18492-1.4001-0.0339-0.31223-0.33096-1.1155-0.96248-1.1061h-0.0517l-0.28139-3e-3zm0.21478 7.9791c0.65351 1.314 1.5548 2.5619 2.7371 3.5629 0.26357 0.22279 0.544 0.43475 0.83269 0.634-2.1471 0.39931-4.4021 0.96102-6.4975 1.8389 0.37891-0.67309 0.78861-1.4064 1.2083-2.1972 0.81274-1.5368 1.3052-2.7222 1.7194-3.8385z" opacity=".2"/>
+		<path d="m22.78 16.18c-0.46126 0-0.89261 0.22577-0.99696 0.59841-0.38752 1.4286 0.0462 3.6379 0.76956 6.3906l-0.21821 0.53294c-0.55387 1.3501-1.2462 2.6947-1.855 3.8879-2.5135 4.918-4.4689 7.5715-5.7727 7.7574l-5e-3 -0.054c-0.0283-0.61346 1.1038-2.1951 2.6382-3.4526 0.16005-0.12944 0.84304-0.79021 0.84304-0.79021s-0.92191 0.48667-1.129 0.61218c-1.9228 1.1477-2.8796 2.2976-3.0356 3.0609-0.0463 0.22672-0.0166 0.5057 0.18375 0.62024l0.4916 0.24694c1.3384 0.66995 2.9841-1.0916 5.172-4.9262 2.2264-0.73036 5.0043-1.418 7.5335-1.7906 2.264 1.2936 4.861 1.9095 5.8588 1.6436 0.18987-0.0502 0.3896-0.19924 0.4916-0.33652 0.08-0.12631 0.19183-0.63172 0.19183-0.63172s-0.18773 0.25547-0.3423 0.33078c-0.63152 0.29811-2.6253-0.19924-4.6712-1.2002 1.769-0.18828 3.2427-0.19554 4.0303 0.0562 1.0003 0.3193 1.0011 0.64659 0.98778 0.71326 0.0135-0.0549 0.0583-0.27418 0.0528-0.36753-0.0227-0.24006-0.0967-0.45443-0.27795-0.63172-0.37027-0.36479-1.2845-0.54862-2.5303-0.56509-0.939-0.0102-2.065 0.072-3.2872 0.24694-0.56012-0.32164-1.1512-0.67522-1.6195-1.113-1.1877-1.1093-2.1832-2.6494-2.8014-4.376 0.0422-0.16553 0.0826-0.32727 0.11944-0.49045 0.17183-0.77271 0.29517-3.3274 0.29517-3.3274s-0.48934 1.9192-0.56622 2.2087c-0.0494 0.18357-0.11086 0.3795-0.18147 0.58347-0.375-1.3179-0.56509-2.5952-0.56509-3.564 0-0.27379 0.0235-0.80656 0.10105-1.2278 0.0378-0.30045 0.1466-0.45647 0.2596-0.53179 0.22357 0.0542 0.47383 0.39708 0.73509 0.97054 0.22435 0.4958 0.21017 1.07 0.21017 1.4254 0 0 0.24061-0.87999 0.18492-1.4001-0.0339-0.31223-0.33096-1.1155-0.96248-1.1061h-0.0517l-0.28139-3e-3zm0.21478 7.9791c0.65351 1.314 1.5548 2.5619 2.7371 3.5629 0.26357 0.22279 0.544 0.43475 0.83269 0.634-2.1471 0.39931-4.4021 0.96102-6.4975 1.8389 0.37891-0.67309 0.78861-1.4064 1.2083-2.1972 0.81274-1.5368 1.3052-2.7222 1.7194-3.8385z" fill="#782121"/>
+	</g>
+	<g transform="matrix(1.1218 0 0 1.1218 18.22 20.903)">
+		<path d="m5.1527-3.2032c-3.2718 0-5.7795 1.525-6.1142 5.276h2.6741c0.35145-1.9561 1.8942-2.638 3.4401-2.638 1.7587 0 3.5174 0.87934 3.5174 3.5174v2.638h-10.846c-0.81192 0-1.465 0.65907-1.465 1.4942v9.3086c0 0.83512 0.65307 1.5079 1.465 1.5079h14.657c0.81192 0 1.465-0.67281 1.465-1.5079v-9.3086c0-0.83512-0.65307-1.4942-1.465-1.4942h-1.173v-2.638c0-4.3967-2.638-6.1554-6.1554-6.1554z" fill="#fff" stroke-width="1.7587"/>
+	</g>
+	<metadata>
+		<rdf:RDF>
+			<cc:Work rdf:about="">
+				<dc:title>qpdf-decode-gui.svg</dc:title>
+				<dc:date>2023-12-03</dc:date>
+				<dc:creator>
+					<cc:Agent>
+						<dc:title>Daltux</dc:title>
+					</cc:Agent>
+				</dc:creator>
+				<dc:description>Icon for qpdf-decode-gui, mixing of application-pdf.svg and emblem-unlocked.svg from Papirus project (GPLv3) - https://git.io/papirus-icon-theme</dc:description>
+				<dc:contributor>
+					<cc:Agent>
+						<dc:title>See Papirus AUTHORS file</dc:title>
+					</cc:Agent>
+				</dc:contributor>
+				<dc:source>papirus-icon-theme</dc:source>
+				<cc:license rdf:resource="https://www.gnu.org/licenses/gpl-3.0.en.html"/>
+			</cc:Work>
+		</rdf:RDF>
+	</metadata>
+</svg>