I upgraded to the latest torch and torchvision using conda install pytorch torchvision -c pytorch as suggest by @richard. I have notice that originally we install these 2 packages from the soumith  channel. Now I try to install graphviz python package, condat tries to downgrade torch and torchvision. The complete message is shown below,

[~]$ conda install graphviz
Fetching package metadata …
Solving package specifications: .
Package plan for installation in environment /home/jdhao/util/anaconda3:
The following NEW packages will be INSTALLED:
graphviz:    2.38.0-5
libtool:     2.4.6-h544aabb_3
pango:       1.40.3-1
The following packages will be UPDATED:
cairo:       1.14.6-4                                   conda-forge --> 1.14.8-0
qt:          5.6.2-3                                    conda-forge --> 5.6.2-5
The following packages will be SUPERSEDED by a higher-priority channel:
fontconfig:  2.12.1-4                                   conda-forge --> 2.12.1-3
freetype:    2.7-1                                      conda-forge --> 2.5.5-2
glib:        2.51.4-0                                   conda-forge --> 2.50.2-1
gstreamer:   1.8.0-2                                    conda-forge --> 1.8.0-0
harfbuzz:    1.4.3-0                                    conda-forge --> 0.9.39-2
matplotlib:  2.1.0-py36_0                               conda-forge --> 2.0.2-np113py36_0
pillow:      4.3.0-py36_0                               conda-forge --> 4.2.1-py36_0
pytorch:     0.3.0-py36_cuda8.0.61_cudnn7.0.3h37a80b5_4 pytorch     --> 0.2.0-py36h53baedd_4cu80 soumith [cuda80]
torchvision: 0.2.0-py36h17b6947_1                       pytorch     --> 0.1.9-py36h7584368_1     soumith
The following packages will be DOWNGRADED:
icu:         58.2-h211956c_0                                        --> 54.1-0

Proceed ([y]/n)?
How to resolve this? Just remove the soumith channel?