diff --git a/linux/build/build.sh b/linux/build/build.sh
index 71c8bbb..6eca3de 100755
--- a/linux/build/build.sh
+++ b/linux/build/build.sh
@@ -8,7 +8,7 @@
 
 arch=$(uname -m)
 language=$(echo $LANG | cut -c-5 | sed s/_/-/g)
-version="52.4.1esr"
+version="52.5.0esr"
 application="firefox"
 ftpmirror="https://ftp.mozilla.org/pub/$application/releases/$version"
 
diff --git a/windows/build/build.cmd b/windows/build/build.cmd
index b45a7ca..0a4e0b8 100644
--- a/windows/build/build.cmd
+++ b/windows/build/build.cmd
@@ -7,8 +7,8 @@ REM See full license text in LICENSE file at top of project tree
 setlocal enableextensions
 
 set CURL=%~dp0curl.exe
-set FFversion=52.4.1
-set I2Pdversion=2.15.0
+set FFversion=52.5.0
+set I2Pdversion=2.16.0
 call :GET_LOCALE
 call :GET_PROXY
 call :GET_ARCH