diff --git a/requirements/common.in b/requirements/common.in
index 65c9939b54..9c696d74af 100644
--- a/requirements/common.in
+++ b/requirements/common.in
@@ -201,5 +201,5 @@ disposable-email-domains==0.0.30
 yamole==2.1.5
 
 # Needed for signing thumbnail requests so that they can be authenticated on the
-# other end.
-libthumbor==1.3.2
+# other end.  Using a fork to eliminate a really slow pkgresources import.
+-e "git+https://github.com/zulip/libthumbor.git@60ed2431c07686a12f2770b2d852c5650f3ccfc6#egg=libthumbor==1.3.2zulip"
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5142657b52..b7702ba05d 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -10,6 +10,7 @@
 --no-binary psycopg2
 
 git+https://github.com/zulip/django-bitfield@0d2b15cdb5af5ddec88d41cac19c0f2ce1b1ad38#egg=django-bitfield==1.9.3+dev.0d2b15cdb5af5ddec88d41cac19c0f2ce1b1ad38
+git+https://github.com/zulip/libthumbor.git@60ed2431c07686a12f2770b2d852c5650f3ccfc6#egg=libthumbor==1.3.2zulip
 git+https://github.com/zulip/talon.git@7d8bdc4dbcfcc5a73298747293b99fe53da55315#egg=talon==1.2.10.zulip1
 git+https://github.com/zulip/ultrajson@70ac02bec#egg=ujson==1.35+git
 git+https://github.com/zulip/python-zulip-api.git@0.5.5#egg=zulip==0.5.5_git&subdirectory=zulip
@@ -88,7 +89,6 @@ jinja2==2.10
 jmespath==0.9.3           # via boto3, botocore
 jsondiff==1.1.1           # via moto
 jsonpickle==0.9.5         # via aws-xray-sdk, python-digitalocean
-libthumbor==1.3.2
 lxml==4.2.3
 markdown-include==0.5.1
 markdown==2.6.11
diff --git a/requirements/prod.txt b/requirements/prod.txt
index 29cacf93e5..06498e56a0 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -10,6 +10,7 @@
 --no-binary psycopg2
 
 git+https://github.com/zulip/django-bitfield@0d2b15cdb5af5ddec88d41cac19c0f2ce1b1ad38#egg=django-bitfield==1.9.3+dev.0d2b15cdb5af5ddec88d41cac19c0f2ce1b1ad38
+git+https://github.com/zulip/libthumbor.git@60ed2431c07686a12f2770b2d852c5650f3ccfc6#egg=libthumbor==1.3.2zulip
 git+https://github.com/zulip/talon.git@7d8bdc4dbcfcc5a73298747293b99fe53da55315#egg=talon==1.2.10.zulip1
 git+https://github.com/zulip/ultrajson@70ac02bec#egg=ujson==1.35+git
 git+https://github.com/zulip/python-zulip-api.git@0.5.5#egg=zulip==0.5.5_git&subdirectory=zulip
@@ -62,7 +63,6 @@ ipython-genutils==0.2.0   # via traitlets
 ipython==6.5.0
 jedi==0.11.0              # via ipython
 jinja2==2.10
-libthumbor==1.3.2
 lxml==4.2.3
 markdown-include==0.5.1
 markdown==2.6.11