diff -urEbwB projectlibre-1.9.3.orig/projectlibre_build/build.xml projectlibre-1.9.3/projectlibre_build/build.xml
--- projectlibre-1.9.3.orig/projectlibre_build/build.xml	2022-04-08 14:44:59.861913215 +0200
+++ projectlibre-1.9.3/projectlibre_build/build.xml	2022-04-08 14:46:12.946356116 +0200
@@ -98,9 +98,7 @@
 				<javac destdir="${build}"
 					classpathref="compile.class.path"
 					debug="off"
-					nowarn="on"
-					source="1.6"
-					target="1.6">
+					nowarn="on">
 						<src path="${src_core}" />
 						<src path="${src_ui}" />
 						<src path="${src_reports}" />
@@ -115,9 +113,7 @@
 				<javac destdir="${build}"
 					classpathref="compile-no_contrib_built.class.path"
 					debug="off"
-					nowarn="on"
-					source="1.6"
-					target="1.6">
+					nowarn="on">
 						<src path="${src_core}" />
 						<src path="${src_ui}" />
 						<src path="${src_reports}" />
diff -urEbwB projectlibre-1.9.3.orig/projectlibre_contrib/build.xml projectlibre-1.9.3/projectlibre_contrib/build.xml
--- projectlibre-1.9.3.orig/projectlibre_contrib/build.xml	2022-04-08 14:44:59.881913336 +0200
+++ projectlibre-1.9.3/projectlibre_contrib/build.xml	2022-04-08 14:45:49.098211594 +0200
@@ -80,9 +80,7 @@
 		<javac destdir="${build}"
 			classpathref="compile.class.path"
 			debug="off"
-			nowarn="on"
-			source="1.6"
-			target="1.6">
+			nowarn="on">
 				<src path="src" />
 				<include name="**/*" />
 		</javac>
diff -urEbwB projectlibre-1.9.3.orig/projectlibre_core/build.xml projectlibre-1.9.3/projectlibre_core/build.xml
--- projectlibre-1.9.3.orig/projectlibre_core/build.xml	2022-04-08 14:44:59.917913554 +0200
+++ projectlibre-1.9.3/projectlibre_core/build.xml	2022-04-08 14:45:35.274127818 +0200
@@ -72,9 +72,7 @@
 		<javac destdir="${build}"
 			classpathref="compile.class.path"
 			debug="off"
-			nowarn="on"
-			source="1.5"
-			target="1.5">
+			nowarn="on">
 				<src path="${src}" />
 				<include name="**/*" />
 				<exclude name="**/version.properties" />
diff -urEbwB projectlibre-1.9.3.orig/projectlibre_exchange/build.xml projectlibre-1.9.3/projectlibre_exchange/build.xml
--- projectlibre-1.9.3.orig/projectlibre_exchange/build.xml	2022-04-08 14:44:59.965913845 +0200
+++ projectlibre-1.9.3/projectlibre_exchange/build.xml	2022-04-08 14:45:25.058065907 +0200
@@ -103,9 +103,7 @@
 		<javac destdir="${build}"
 			classpathref="compile.class.path"
 			debug="off"
-			nowarn="on"
-			source="1.5"
-			target="1.5">
+			nowarn="on">
 				<src path="${src}" />
 				<include name="**/*" />
 				<exclude name="**/version.properties" />