diff --git a/src/Constants.jl b/src/Constants.jl
new file mode 100644
index 0000000000000000000000000000000000000000..b1e5db73dc4672aa719861d5cf58e5fc918d9939
--- /dev/null
+++ b/src/Constants.jl
@@ -0,0 +1,34 @@
+# ** header v3.0
+# This file is a part of the CaosDB Project.
+#
+# Copyright (C) 2021 Indiscale GmbH <info@indiscale.com>
+# Copyright (C) 2021 Florian Spreckelsen <f.spreckelsen@indiscale.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with this program. If not, see
+# <https://www.gnu.org/licenses/>.
+#
+# ** end header
+#
+
+module Constants
+
+export MIN_CCAOSDB_VERSION
+
+"""
+The minimum version of CaosDB's cpplib and C interface that is
+supported by this version of CaosDB.jl.
+"""
+const MIN_CCAOSDB_VERSION = v"0.0.16"
+
+end
diff --git a/test/runtests.jl b/test/runtests.jl
index 8f522788fc801d7718e35d90b483af5f4f547c69..c2ae2face7fdc82805eab16055069ae4a33c5b04 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -25,6 +25,7 @@ using CaosDB
 
 @testset "CaosDBUnitTests" begin
     @testset "TestCaosdbCppLibVersion" begin
+
         @test CaosDB.Utility.get_ccaosdb_version() >= CaosDB.Constants.MIN_CCAOSDB_VERSION
     end