diff --git a/.gitignore b/.gitignore
index 2720fc2..fa5c39f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,3 +18,9 @@
 /alembic-1.8.2.tar.gz
 /alembic-1.8.3.tar.gz
 /alembic-1.8.4.tar.gz
+/alembic-1.8.5.tar.gz
+/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 d2a21bb..4f9b621 100644
--- a/alembic.spec
+++ b/alembic.spec
@@ -5,30 +5,18 @@
 # Python Module
 
 Name:           alembic
-Version:        1.8.4
+Version:        1.8.10
 Release:        %autorelease
 Summary:        Open framework for storing and sharing scene data
-License:        BSD
+License:        BSD-3-Clause AND BSL-1.0
 URL:            http://alembic.io/
-
 Source0:        https://github.com/%{name}/%{name}/archive/%{version}%{?prerelease}.tar.gz#/%{name}-%{version}%{?prerelease}.tar.gz
 
-# Use patch from Gentoo fixing iblmbase root path
-# https://gitweb.gentoo.org/repo/gentoo.git/tree/media-gfx/alembic/files/alembic-1.7.11-0002-Find-IlmBase-by-setting-a-proper-ILMBASE_ROOT-value.patch?id=953b3b21db55df987dd8006dcdec19e945294d98
-Patch0:         alembic-1.7.11-0002-Find-IlmBase-by-setting-a-proper-ILMBASE_ROOT-value.patch 
 BuildRequires:  boost-devel
 BuildRequires:  cmake >= 3.13
-BuildRequires:	gcc-c++
+BuildRequires:  gcc-c++
 BuildRequires:  hdf5-devel
-
-# Per https://github.com/alembic/alembic/blob/master/README.txt
-# alembic actually needs ilmbase, not OpenEXR.
-# As of OpenEXR 3.x Imath is now a standalone library.
-%if 0%{?fedora} > 34
 BuildRequires:  cmake(Imath)
-%else
-BuildRequires:  pkgconfig(IlmBase)
-%endif
 BuildRequires:  pkgconfig(zlib)
 
 %description
@@ -50,8 +38,9 @@ rendered image data.
 
 %package        devel
 Summary:        Development files for %{name}
-Requires:       %{name}%{?_isa} = %{version}-%{release}
+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
diff --git a/sources b/sources
index b549d5a..c42304e 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (alembic-1.8.4.tar.gz) = 2473f4b9afe3fddbd2d0477bdc85d93697e413410253a7f7f0f030fba919dfb63dabd2d2d13829f59f3f901643ab842d230a9f08fb667e2c16cef0e751a8a687
+SHA512 (alembic-1.8.10.tar.gz) = 0be292e9d75560891d38129eb2672c55475b29b33f265dd51396dfa7b530c92ac6dfdb05a4432ad1b6919e2c151068560eb04efb8d9b0c2a14f77ab489d3542c