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diff --git a/README.md b/README.md
index 9ef4749418..dc869da0da 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ You'll need a Java SDK. The baseline version is 6 for 2.11.x, 8 for
2.12.x. (It's also possible to use a later SDK for local development,
but the CI will verify against the baseline version.)
-You'll also need Apache Ant (version 1.9.0 or above) and curl (for `./pull-binary-libs.sh`).
+You'll also need Apache Ant (version 1.9.3 or above) and curl (for `./pull-binary-libs.sh`).
Mac OS X and Linux work. Windows may work if you use Cygwin. (Community help with keeping the build working on Windows is appreciated.)
@@ -189,7 +189,7 @@ We typically alias `build/quick/bin/scalac -d sandbox` to `qsc` and `build/quick
Note: on most machines this requires more heap than is allocated by default. You can adjust the parameters with `ANT_OPTS`. Example command line:
```sh
-ANT_OPTS="-Xms512M -Xmx2048M -Xss1M -XX:MaxPermSize=128M" ant docs
+ANT_OPTS="-Xms512M -Xmx2048M -Xss1M" ant docs
```
### Bootstrapping concepts