diff --git a/.gitignore b/.gitignore
index af1a2cb..cb34f0a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ par2cmdline-0.4-tbb-20100203.tar.gz
 /par2cmdline-0.7.4.tar.bz2
 /par2cmdline-0.8.0.tar.bz2
 /par2cmdline-0.8.1.tar.bz2
+/par2cmdline-0.8.1.tar.bz2.sig
diff --git a/gpg-db2277bcd500aa3825610bdddb323392796ca067.asc b/gpg-db2277bcd500aa3825610bdddb323392796ca067.asc
new file mode 100644
index 0000000..a4de690
--- /dev/null
+++ b/gpg-db2277bcd500aa3825610bdddb323392796ca067.asc
@@ -0,0 +1,89 @@
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diff --git a/par2cmdline.spec b/par2cmdline.spec
index 1235d47..62686c1 100644
--- a/par2cmdline.spec
+++ b/par2cmdline.spec
@@ -1,17 +1,24 @@
 Name: par2cmdline
 Version: 0.8.1
-Release: 3%{?dist}
+Release: 4%{?dist}
 Summary: PAR 2.0 compatible file verification and repair tool
 
 License: GPLv2+
 URL: https://github.com/Parchive/par2cmdline/
 Source0: https://github.com/Parchive/par2cmdline/releases/download/v%{version}/par2cmdline-%{version}.tar.bz2
+Source1: https://github.com/Parchive/par2cmdline/releases/download/v%{version}/par2cmdline-%{version}.tar.bz2.sig
+# GitHub releases are signed by GitHub user https://github.com/BlackIkeEagle
+# which has verified his GitHub handle via his Keybase.io profile
+# https://keybase.io/blackikeeagle.
+Source2: https://keybase.io/blackikeeagle/pgp_keys.asc?fingerprint=db2277bcd500aa3825610bdddb323392796ca067#/gpg-db2277bcd500aa3825610bdddb323392796ca067.asc
 # Fix tests to account for endianness correctly.
 # Backport of https://github.com/Parchive/par2cmdline/commit/4f3576a314d7169912842ec9dc1e595e61e52653.
 Patch0: 0001-Fix-for-Github-issue-143.-Test-did-not-account-for-e.patch
 
 BuildRequires: make
 BuildRequires: gcc-c++
+# Needed for source file verification.
+BuildRequires: gnupg2
 
 
 %description
@@ -23,6 +30,7 @@ multi-part archives.
 
 
 %prep
+%{gpgverify} --keyring='%{SOURCE2}' --signature='%{SOURCE1}' --data='%{SOURCE0}'
 %autosetup -p 1
 
 # Remove executable permission from text files
@@ -53,6 +61,9 @@ make check-TESTS
 
 
 %changelog
+* Wed Mar 31 2021 Tadej Janež <tadej.j@nez.si> - 0.8.1-4
+- Add source file verification
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.8.1-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 
diff --git a/sources b/sources
index 90991f7..939ec4c 100644
--- a/sources
+++ b/sources
@@ -1 +1,2 @@
 SHA512 (par2cmdline-0.8.1.tar.bz2) = b33ee654bd14269afb02d48175abf183281270c3e0dad9ffcaa0aa69c4271715a85e550d6d56fe5460ebfe9a37dc53b7d2210cd79a6f55d3921dc5dd5972c846
+SHA512 (par2cmdline-0.8.1.tar.bz2.sig) = 29ad728348a7d13a4534c4d5a6fff0856614ddc291e9e4d9a7dcc1996723a8db345879bb320522b533b87d65a9e7fb5f8335c5f538149dab2d3d9593149d8239