diff --git a/antlr3.changes b/antlr3.changes
index 496ac9c..1dbc8ce 100644
--- a/antlr3.changes
+++ b/antlr3.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Feb 20 10:54:40 UTC 2024 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Use %patch -P N instead of deprecated %patchN.
+
 -------------------------------------------------------------------
 Mon Sep 25 09:21:59 UTC 2023 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/antlr3.spec b/antlr3.spec
index 9ea064f..7f85fcf 100644
--- a/antlr3.spec
+++ b/antlr3.spec
@@ -125,15 +125,15 @@ BuildArch:      noarch
 %prep
 %setup -q -n antlr3-%{antlr_version}
 %if %{with bootstrap}
-%patch100
+%patch -P 100
 %pom_remove_plugin :antlr3-maven-plugin tool
 %endif
 
 sed -i "s,\${buildNumber},`date -u -d@${SOURCE_DATE_EPOCH:-$(date +%%s)}`," tool/src/main/resources/org/antlr/antlr.properties
-%patch0 -p1
-%patch1
-%patch2 -p1
-%patch3 -p1
+%patch -P 0 -p1
+%patch -P 1
+%patch -P 2 -p1
+%patch -P 3 -p1
 
 # remove pre-built artifacts
 find -type f -a -name *.jar -delete