diff --git a/.gitignore b/.gitignore
index 273a4e5..fa5c39f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,5 @@
 /alembic-1.8.6.tar.gz
 /alembic-1.8.7.tar.gz
 /alembic-1.8.8.tar.gz
+/alembic-1.8.9.tar.gz
+/alembic-1.8.10.tar.gz
diff --git a/alembic-1.7.11-0002-Find-IlmBase-by-setting-a-proper-ILMBASE_ROOT-value.patch b/alembic-1.7.11-0002-Find-IlmBase-by-setting-a-proper-ILMBASE_ROOT-value.patch
deleted file mode 100644
index c561e26..0000000
--- a/alembic-1.7.11-0002-Find-IlmBase-by-setting-a-proper-ILMBASE_ROOT-value.patch
+++ /dev/null
@@ -1,72 +0,0 @@
-From 60bbcde225f3c28a36d8643c451509d9deb09222 Mon Sep 17 00:00:00 2001
-From: Bernd Waibel <waebbl@gmail.com>
-Date: Sat, 15 Jun 2019 13:34:09 +0200
-Subject: [PATCH 2/5] Find IlmBase by setting a proper ILMBASE_ROOT value and
- by using pkg-config to determine the installed ilmbase version, instead of
- using the cmake STRINGS command.
-
-Signed-off-by: Bernd Waibel <waebbl@gmail.com>
----
- cmake/Modules/FindIlmBase.cmake   | 18 +++++++++++++++++-
- cmake/Modules/FindPyIlmBase.cmake |  2 +-
- 2 files changed, 18 insertions(+), 2 deletions(-)
-
-diff --git a/cmake/Modules/FindIlmBase.cmake b/cmake/Modules/FindIlmBase.cmake
-index 679a02f..0fe2b1a 100644
---- a/cmake/Modules/FindIlmBase.cmake
-+++ b/cmake/Modules/FindIlmBase.cmake
-@@ -52,7 +52,7 @@ IF(NOT DEFINED ILMBASE_ROOT)
-           SET( ALEMBIC_ILMBASE_ROOT NOTFOUND )
-         ELSE()
-           # TODO: set to default install path when shipping out
--          SET( ALEMBIC_ILMBASE_ROOT "/usr/local/ilmbase-1.0.1/" )
-+          SET( ALEMBIC_ILMBASE_ROOT "/usr" )
-         ENDIF()
-     ELSE()
-         IF ( ${WINDOWS} )
-@@ -87,6 +87,21 @@ SET(_ilmbase_SEARCH_DIRS
-     /usr/freeware
- )
- 
-+# use pkg-config to determine the correct version
-+include(FindPkgConfig)
-+IF(PKG_CONFIG_FOUND)
-+    PKG_CHECK_MODULES(PC_ILMBASE QUIET IlmBase)
-+    IF(PC_ILMBASE_FOUND)
-+        SET(ILMBASE_VERSION ${PC_ILMBASE_VERSION})
-+        SET(ALEMBIC_ILMBASE_INCLUDE_DIRECTORY ${PC_ILMBASE_INCLUDE_DIRS})
-+        STRING(REGEX MATCH "-lHalf" ALEMBIC_ILMBASE_HALF_LIB ${PC_ILMBASE_LDFLAGS})
-+        STRING(REGEX MATCH "-lIex" ALEMBIC_ILMBASE_IEX_LIB ${PC_ILMBASE_LDFLAGS})
-+        STRING(REGEX MATCH "-lIexMath" ALEMBIC_ILMBASE_IEXMATH_LIB ${PC_ILMBASE_LDFLAGS})
-+        STRING(REGEX MATCH "-lIlmThread" ALEMBIC_ILMBASE_ILMTHREAD_LIB ${PC_ILMBASE_LDFLAGS})
-+        String(REGEX MATCH "-lImath" ALEMBIC_ILMBASE_IMATH_LIB ${PC_ILMBASE_LDFLAGS})
-+    ENDIF()
-+ELSE(PKG_CONFIG_FOUND)
-+
- FIND_PATH(ILMBASE_INCLUDE_DIR
-   NAMES
-     IlmBaseConfig.h
-@@ -179,6 +194,7 @@ IF ( ${ALEMBIC_ILMBASE_INCLUDE_DIRECTORY} STREQUAL "ALEMBIC_ILMBASE_INCLUDE_DIRE
-   MESSAGE( FATAL_ERROR "ilmbase header files not found, required: ALEMBIC_ILMBASE_ROOT: ${ALEMBIC_ILMBASE_ROOT}" )
- ENDIF()
- 
-+ENDIF(PKG_CONFIG_FOUND)
- 
- MESSAGE( STATUS "ILMBASE INCLUDE PATH: ${ALEMBIC_ILMBASE_INCLUDE_DIRECTORY}" )
- MESSAGE( STATUS "HALF LIB: ${ALEMBIC_ILMBASE_HALF_LIB}" )
-diff --git a/cmake/Modules/FindPyIlmBase.cmake b/cmake/Modules/FindPyIlmBase.cmake
-index d55f8d3..b5f3cb5 100644
---- a/cmake/Modules/FindPyIlmBase.cmake
-+++ b/cmake/Modules/FindPyIlmBase.cmake
-@@ -44,7 +44,7 @@ ELSE()
-               SET(ALEMBIC_PYILMBASE_ROOT NOTFOUND)
-             ELSE()
-               # TODO: set to default install path when shipping out
--              SET(ALEMBIC_PYILMBASE_ROOT "/usr/local/pyilmbase/")
-+              SET(ALEMBIC_PYILMBASE_ROOT "/usr")
-             ENDIF()
-         ELSE()
-             IF (${WINDOWS})
--- 
-2.22.0
-
diff --git a/alembic.spec b/alembic.spec
index 0e43486..4f9b621 100644
--- a/alembic.spec
+++ b/alembic.spec
@@ -5,7 +5,7 @@
 # Python Module
 
 Name:           alembic
-Version:        1.8.8
+Version:        1.8.10
 Release:        %autorelease
 Summary:        Open framework for storing and sharing scene data
 License:        BSD-3-Clause AND BSL-1.0
@@ -40,6 +40,7 @@ rendered image data.
 Summary:        Development files for %{name}
 Requires:       %{name}-libs%{?_isa} = %{version}-%{release}
 Requires:       cmake%{?_isa}
+Requires:       imath-devel%{?_isa}
 
 %description    devel
 The %{name}-devel package contains libraries and header files for developing
@@ -83,7 +84,7 @@ export CXXFLAGS="%{optflags} -Wl,--as-needed"
 %{_bindir}/abctree
 
 %files libs
-%license LICENSE.txt                                       
+%license LICENSE.txt
 %doc ACKNOWLEDGEMENTS.txt FEEDBACK.txt NEWS.txt README.txt
 %{_libdir}/libAlembic.so.*
 
diff --git a/sources b/sources
index 1d74aa8..c42304e 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (alembic-1.8.8.tar.gz) = 02b7bf5782e83efb08a8653f130b02565fa997e857dbd8d0523e1b218ff58d929fbf9690db0980e8101a31f01a67341b6000af8794538890ef7d759fe0289e2f
+SHA512 (alembic-1.8.10.tar.gz) = 0be292e9d75560891d38129eb2672c55475b29b33f265dd51396dfa7b530c92ac6dfdb05a4432ad1b6919e2c151068560eb04efb8d9b0c2a14f77ab489d3542c