diff --git a/Dockerfile b/Dockerfile
index f994db4..baf0e50 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,9 +3,9 @@
 FROM ubuntu:18.04
 
 # SDK version
-ENV ANDROID_SDK_VERSION 4333796
-ENV PLATFORM_VERSION 28
-ENV BUILD_TOOLS_VERSION 28.0.3
+ENV ANDROID_SDK_VERSION 6200805
+ENV PLATFORM_VERSION 29
+ENV BUILD_TOOLS_VERSION 29.0.3
 
 # Never ask for confirmations
 ENV DEBIAN_FRONTEND noninteractive
diff --git a/bump-sdk-version b/bump-sdk-version
index 533a22d..52a212c 100755
--- a/bump-sdk-version
+++ b/bump-sdk-version
@@ -23,19 +23,19 @@ echo "+ Assuming platform version $PLATFORM_VERSION"
 
 echo "+ Replacing ANDROID_SDK_VERSION in Dockerfile"
 
-sed -i '' "s/ENV ANDROID_SDK_VERSION .*/ENV ANDROID_SDK_VERSION $ANDROID_SDK_VERSION/" \
+sed -i "s/ENV ANDROID_SDK_VERSION .*/ENV ANDROID_SDK_VERSION $ANDROID_SDK_VERSION/" \
     Dockerfile \
     ndk/Dockerfile
 
 echo "+ Replacing BUILD_TOOLS_VERSION in Dockerfile"
 
-sed -i '' "s/ENV BUILD_TOOLS_VERSION .*/ENV BUILD_TOOLS_VERSION $BUILD_TOOLS_VERSION/" \
+sed -i "s/ENV BUILD_TOOLS_VERSION .*/ENV BUILD_TOOLS_VERSION $BUILD_TOOLS_VERSION/" \
     Dockerfile \
     ndk/Dockerfile
 
 echo "+ Replacing PLATFORM_VERSION in Dockerfile"
 
-sed -i '' "s/ENV PLATFORM_VERSION .*/ENV PLATFORM_VERSION $PLATFORM_VERSION/" \
+sed -i "s/ENV PLATFORM_VERSION .*/ENV PLATFORM_VERSION $PLATFORM_VERSION/" \
     Dockerfile \
     ndk/Dockerfile
 
diff --git a/ndk/Dockerfile b/ndk/Dockerfile
index bfb59db..60dfc63 100644
--- a/ndk/Dockerfile
+++ b/ndk/Dockerfile
@@ -3,9 +3,9 @@
 FROM ubuntu:18.04
 
 # SDK version
-ENV ANDROID_SDK_VERSION 4333796
-ENV PLATFORM_VERSION 28
-ENV BUILD_TOOLS_VERSION 28.0.3
+ENV ANDROID_SDK_VERSION 6200805
+ENV PLATFORM_VERSION 29
+ENV BUILD_TOOLS_VERSION 29.0.3
 
 # Never ask for confirmations
 ENV DEBIAN_FRONTEND noninteractive