diff --git a/.gitignore b/.gitignore
index c330fcb..b4daf23 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,3 +53,4 @@ clog
 /OpenImageIO-1.7.14.tar.gz
 /OpenImageIO-1.7.15.tar.gz
 /OpenImageIO-1.7.17.tar.gz
+/OpenImageIO-1.8.5.tar.gz
diff --git a/OpenImageIO.spec b/OpenImageIO.spec
index e4f318b..f341c40 100644
--- a/OpenImageIO.spec
+++ b/OpenImageIO.spec
@@ -2,8 +2,8 @@
 #global beta beta1
 
 Name:           OpenImageIO
-Version:        1.7.17
-Release:        2%{?dist}
+Version:        1.8.6
+Release:        1%{?dist}
 Summary:        Library for reading and writing images
 
 Group:          Development/Libraries
@@ -21,7 +21,11 @@ Patch2:         OpenImageIO-as_needed.patch
 BuildRequires:  cmake gcc-c++
 BuildRequires:  txt2man
 BuildRequires:  qt4-devel
+%if 0%{?rhel} && 0%{?rhel} < 7
+BuildRequires:  boost148-devel
+%else
 BuildRequires:  boost-devel
+%endif
 BuildRequires:  glew-devel
 BuildRequires:  OpenEXR-devel ilmbase-devel
 BuildRequires:  python2-devel
@@ -136,6 +140,10 @@ rm -rf build/linux && mkdir -p build/linux && pushd build/linux
 %endif
 %ifarch ppc ppc64
        -DNOTHREADS:BOOL=FALSE \
+%endif
+%if 0%{?rhel} && 0%{?rhel} < 7
+       -DBOOST_INCLUDEDIR=%{_includedir}/boost148 \
+       -DBOOST_LIBRARYDIR=%{_libdir}/boost148 \
 %endif
        -DVERBOSE=TRUE \
        ../../
@@ -188,6 +196,9 @@ cp -a src/doc/*.1 %{buildroot}%{_mandir}/man1
 
 
 %changelog
+* Thu Nov 02 2017 Richard Shaw <hobbes1069@gmail.com> - 1.8.6-1
+- Update to latest upstream release.
+
 * Mon Sep 04 2017 Richard Shaw <hobbes1069@gmail.com> - 1.7.17-2
 - Add patch to remove opencv qt5 dependency.
 
diff --git a/sources b/sources
index bfd17db..c847d09 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (OpenImageIO-1.7.17.tar.gz) = c5ee9173d3acc24a5045e6ac97657d4bf0c5ac1d3250497db51b8bd9e27e2fc48979eba3598635eb6053b87748f8827be2d2831d425459a41c893e6cb43bce94
+SHA512 (OpenImageIO-1.8.5.tar.gz) = 439b2ea3e741690ea71b8f0cb6cdfd9627ceff436e9f26b69a621fe0ff7a6e64c8ba15a1ae5f909edb142334f0c8cda53def56eac56afa89699b8c806aa4a072