diff --git a/openexr.changes b/openexr.changes
index 53e9697..e90ad0d 100644
--- a/openexr.changes
+++ b/openexr.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Nov  7 11:07:19 UTC 2018 - Jan Engelhardt <jengelh@inai.de>
+
+- Codify new ilmbase requirements.
+
 -------------------------------------------------------------------
 Wed Nov  7 09:42:59 UTC 2018 - Petr Gajdos <pgajdos@suse.com>
 
diff --git a/openexr.spec b/openexr.spec
index 5cd450b..ea32fbe 100644
--- a/openexr.spec
+++ b/openexr.spec
@@ -41,7 +41,7 @@ BuildRequires:  fltk-devel
 BuildRequires:  freeglut-devel
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig
-BuildRequires:  pkgconfig(IlmBase) >= 2.2.0
+BuildRequires:  pkgconfig(IlmBase) >= 2.3.0
 BuildRequires:  pkgconfig(zlib)
 %if %{asan_build} || %{debug_build}
 BuildRequires:  ilmbase-debugsource
@@ -106,7 +106,7 @@ Summary:        Development files for the 16-bit FP EXR picture handling library
 Group:          Development/Libraries/C and C++
 Requires:       libIlmImf%{so_suffix} = %{version}
 Requires:       libIlmImfUtil%{so_suffix} = %{version}
-Requires:       libilmbase-devel
+Requires:       libilmbase-devel >= 2.3.0
 Requires:       pkgconfig
 Requires:       pkgconfig(zlib)
 Obsoletes:      OpenEXR-devel <= 1.6.1