diff --git a/bsf.spec b/bsf.spec
index 87dbb3d..9577494 100644
--- a/bsf.spec
+++ b/bsf.spec
@@ -1,7 +1,7 @@
 Name:           bsf
 Epoch:          0
 Version:        2.4.0
-Release:        38%{?dist}
+Release:        39%{?dist}
 Summary:        Bean Scripting Framework
 License:        ASL 2.0
 URL:            http://commons.apache.org/bsf/
@@ -14,9 +14,10 @@ Patch0:         java-11-fixes.patch
 
 BuildRequires:  javapackages-local
 BuildRequires:  ant
-BuildRequires:  apache-parent
-BuildRequires:  xalan-j2
 BuildRequires:  apache-commons-logging
+BuildRequires:  apache-parent
+BuildRequires:  rhino
+BuildRequires:  xalan-j2
 
 %description
 Bean Scripting Framework (BSF) is a set of Java classes which provides
@@ -60,7 +61,7 @@ find -name \*.jar -delete
 %mvn_alias : org.apache.bsf:
 
 %build
-export CLASSPATH=$(build-classpath apache-commons-logging xalan-j2)
+export CLASSPATH=$(build-classpath apache-commons-logging rhino xalan-j2)
 ant jar javadocs
 
 %mvn_artifact %{SOURCE1} build/lib/%{name}.jar
@@ -76,6 +77,9 @@ ant jar javadocs
 %license LICENSE.txt NOTICE.txt
 
 %changelog
+* Fri Aug 28 2020 Fabio Valentini <decathorpe@gmail.com> - 0:2.4.0-39
+- Re-enable JavaScript support (RHBZ#1858613).
+
 * Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0:2.4.0-38
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild