diff --git a/install-sdk.sh b/install-sdk.sh
index af5b95222..a5456e7f6 100755
--- a/install-sdk.sh
+++ b/install-sdk.sh
@@ -5,4 +5,4 @@ test -f $HOME/.termuxrc && . $HOME/.termuxrc
 : ${ANDROID_HOME:="${HOME}/lib/android-sdk"}
 
 $ANDROID_HOME/tools/android update sdk --no-ui --all --no-https -t "build-tools-23.0.2"
-$ANDROID_HOME/tools/android update sdk --no-ui --all --no-https -t "android-21"
+$ANDROID_HOME/tools/android update sdk --no-ui --all --no-https -t "android-23"
diff --git a/packages/ecj/build.sh b/packages/ecj/build.sh
index fb2049b08..ee9736896 100755
--- a/packages/ecj/build.sh
+++ b/packages/ecj/build.sh
@@ -1,7 +1,7 @@
 TERMUX_PKG_HOMEPAGE=http://www.eclipse.org/jdt/core/
 TERMUX_PKG_DESCRIPTION="Eclipse Compiler for Java"
-TERMUX_PKG_VERSION=4.4.2
-TERMUX_PKG_SRCURL=http://ftp.acc.umu.se/mirror/eclipse.org/eclipse/downloads/drops4/R-${TERMUX_PKG_VERSION}-201502041700/ecj-${TERMUX_PKG_VERSION}.jar
+TERMUX_PKG_VERSION=4.5.2
+TERMUX_PKG_SRCURL=http://ftp.acc.umu.se/mirror/eclipse.org/eclipse/downloads/drops4/R-${TERMUX_PKG_VERSION}-201602121500/ecj-${TERMUX_PKG_VERSION}.jar
 TERMUX_PKG_PLATFORM_INDEPENDENT=true
 
 termux_step_extract_package () {
@@ -26,7 +26,7 @@ termux_step_make () {
 	cd android-jar
 
         # We need the android classes for JDT to compile against.
-	cp $ANDROID_HOME/platforms/android-21/android.jar .
+	cp $ANDROID_HOME/platforms/android-23/android.jar .
 	unzip android.jar
 	rm -Rf android.jar resources.arsc res assets
 	zip -r android.jar .
diff --git a/packages/jack/build.sh b/packages/jack/build.sh
index 35584fd6e..8405393f1 100755
--- a/packages/jack/build.sh
+++ b/packages/jack/build.sh
@@ -24,7 +24,7 @@ termux_step_make () {
 	cd android-jar
 
         # We need the android.jar clases in jill format (.jack extension) for jack to compile against.
-	cp $ANDROID_HOME/platforms/android-21/android.jar .
+	cp $ANDROID_HOME/platforms/android-23/android.jar .
 	# Remove resources not needed for compilation to reduce size:
 	unzip android.jar
 	rm -Rf android.jar resources.arsc res assets