diff --git a/README.md b/README.md
index 603204f..1689b15 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,8 @@ Please remember about specifying the desired version.
 Note that simdjson-java follows the [SemVer specification](https://semver.org/), which means, for example, that a major 
 version of zero indicates initial development, so the library's API should not be considered stable.
 
+We require Java 20 or better.
+
 ## Benchmarks
 
 To run the JMH benchmarks, execute the following command:
@@ -90,3 +92,5 @@ Environment:
 To reproduce the benchmark results, execute the following command:
 
 ```./gradlew jmh -Pjmh.includes='.*ParseAndSelectBenchmark.*'```
+
+The benchmark may take several minutes. Remember that you need Java 20 or better.
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