diff --git a/.gitignore b/.gitignore
index 46ef134..1d97fb8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-SOURCES/dotnet-v2.1.14.tar.gz
+SOURCES/dotnet-v2.1.511.tar.gz
diff --git a/.rh-dotnet21-dotnet.metadata b/.rh-dotnet21-dotnet.metadata
index e62b56d..2d72e1d 100644
--- a/.rh-dotnet21-dotnet.metadata
+++ b/.rh-dotnet21-dotnet.metadata
@@ -1 +1 @@
-da5f32c3a5ff47343a7e6e720958e5392e3e39b5 SOURCES/dotnet-v2.1.14.tar.gz
+4452dd1fde9ef3d51c77eb002a6f1b0b7ebd84a2 SOURCES/dotnet-v2.1.511.tar.gz
diff --git a/SPECS/dotnet.spec b/SPECS/dotnet.spec
index a79282b..e50b8cd 100644
--- a/SPECS/dotnet.spec
+++ b/SPECS/dotnet.spec
@@ -30,25 +30,21 @@
 # on system libcurl package. We require the %%{?scl_prefix}libcurl package
 %global __requires_exclude ^(%{privlibs}|libcurl)\\.so
 
-%global runtime_version 2.1.14
-%global sdk_version 2.1.510
+%global runtime_version 2.1.15
+%global sdk_version 2.1.511
 
 Name:           %{?scl_prefix}dotnet
 Version:        %{sdk_version}
-Release:        2%{?dist}
+Release:        1%{?dist}
 Group:          Development/Languages
 Summary:        .NET Core CLI tools and runtime
 License:        MIT and ASL 2.0 and BSD
 URL:            https://github.com/dotnet/
 
 # The source is generated on a RHEL box via:
-# - git clone https://github.com/dotnet/source-build
-# - git checkout v%%{sdk_version}
-# - set environment variables + tweak sources to build
-# - ./build-source-tarball.sh dotnet-%%{sdk_version}
-# - tar cvzf dotnet-%%{sdk_version}.tar.gz dotnet-%%{sdk_version}
+# ./build-dotnet-tarball v%%{sdk_version}
 
-Source0:        dotnet-v%{runtime_version}.tar.gz
+Source0:        dotnet-v%{sdk_version}.tar.gz
 Source1:        check-debug-symbols.py
 Source2:        https://raw.githubusercontent.com/dotnet/cli/53f485c23cc467c62f80252696b8ec51ce8b4564/scripts/register-completions.bash
 
@@ -160,7 +156,7 @@ It particularly focuses on creating console applications, web
 applications and micro-services.
 
 %prep
-%setup -q -n %{pkg_name}-v%{runtime_version}
+%setup -q -n %{pkg_name}-v%{sdk_version}
 
 # See https://github.com/dotnet/source-build/pull/669
 rm -rf Tools/configuration/configuration.props
@@ -257,6 +253,10 @@ echo "Testing build results for debug symbols..."
 %{_libdir}/%{pkg_name}/sdk/%{sdk_version}
 
 %changelog
+* Mon Dec 23 2019 Omair Majid <omajid@redhat.com> - 2.1.511-1
+- Update to .NET Core Runtime 2.1.15 and SDK 2.1.511
+- Resolves: RHBZ#1786178
+
 * Thu Nov 07 2019 Radka Janekova <rjanekov@redhat.com> - 2.1.510-2
 - Update to rebuild .NET Core Runtime 2.1.14 and SDK 2.1.510
 - Resolves: RHBZ#1767628