diff --git a/rubygem-prawn.spec b/rubygem-prawn.spec
index ffde377..28147b1 100644
--- a/rubygem-prawn.spec
+++ b/rubygem-prawn.spec
@@ -3,7 +3,7 @@
 Summary: A fast and nimble PDF generator for Ruby
 Name: rubygem-%{gem_name}
 Version: 2.4.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 # afm files are licensed by APAFML, the rest of package is GPLv2 or GPLv3 or Ruby
 License: (GPLv2 or GPLv3 or Ruby) and APAFML
 URL: http://prawnpdf.org
@@ -21,7 +21,6 @@ BuildRequires: rubygem(ttfunk) >= 1.7
 BuildRequires: rubygem(pdf-reader) >= 1.4.0
 BuildRequires: rubygem(pdf-inspector) >= 1.2.1
 BuildRequires: rubygem(pdf-core) >= 0.9.0
-BuildRequires: rubygem(bigdecimal)
 BuildArch: noarch
 
 %description
@@ -105,6 +104,9 @@ popd
 %doc %{gem_instdir}/data/fonts/MustRead.html
 
 %changelog
+* Tue Jan 12 2021 Vít Ondruch <vondruch@redhat.com> - 2.4.0-2
+- Drop buildtime dependency on rubygem(bigdecimal).
+
 * Fri Jan 8 2021 Christopher Brown <chris.brown@redhat.com> - 2.4.0-1
 - Update to 2.4.0
   Resolves: rhbz#1911811