diff --git a/README.md b/README.md
index da02dc8..3e54b26 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,19 @@
-## Trapping simulation
\ No newline at end of file
+## Trapping simulation
+
+## Building executable
+
+1. Create a fat jar distribution:
+```
+./gradlew shadowJar
+```
+The output file is located in `build/libs/trapping-1.1.0-all.jar`
+
+2. Run cross-sections computations
+```
+java -cp trapping-1.1.0-all.jar ru.inr.mass.trapping.CrosssectionsKt
+```
+
+3. Run simulation:
+```
+./gradlew run   
+```
diff --git a/build.gradle.kts b/build.gradle.kts
index 7cf3972..b367665 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,12 +1,14 @@
 plugins {
     kotlin("jvm") version "1.4.10"
     application
+    id("com.github.johnrengelman.shadow") version "6.1.0"
 }
 
 group = "ru.inr.mass"
 version = "1.1.0"
 
 description = "Numass trapping simulation"
+
 application {
     mainClassName = "ru.inr.mass.trapping.MainKt"
 }