diff --git a/requirements.txt b/requirements.txt
index a2c37eb..545f400 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,57 +1,57 @@
 argparse==1.2.1
-arrow>=0.10.0
-bitstring
+arrow==0.10.0
+bitstring==3.1.5
 cmd2==0.7.0
-colorama>=0.2.5
+colorama==0.3.9
 cython==0.24.1
-decorator>=3.4.0
-docker-py
-fluent-logger>=0.4.3
-grpc>=0.3
+decorator==4.1.2
+docker-py==1.10.6
+fluent-logger==0.6.0
+grpc==0.3.post19
 grpcio==1.3.5
 grpcio-tools==1.3.5
-hash_ring>=1.3.1
-hexdump>=3.3
-jinja2>=2.8
-jsonpatch>=1.14
-kafka_python>=1.3.1
-klein>=15.3.1
-netaddr>=0.7.19
-networkx>=1.11
-nose>=1.3.7
-nose-exclude>=0.5.0
-mock>=1.3.0
-netifaces>=0.10.4
-pcapy>=0.10.10
-pep8>=1.5.7
+hash_ring==1.3.1
+hexdump==3.3
+jinja2==2.8
+jsonpatch==1.16
+kafka_python==1.3.5
+klein==17.10.0
+netaddr==0.7.19
+networkx==2.0
+nose==1.3.7
+nose-exclude==0.5.0
+mock==2.0.0
+netifaces==0.10.6
+pcapy==0.11.1
+pep8==1.7.1
 pep8-naming>=0.3.3
 protobuf==3.3.0
-protobuf-to-dict>=0.1.0
-pyflakes>=1.0.0
-pylint>=1.5.2
+protobuf-to-dict==0.1.0
+pyflakes==1.6.0
+pylint==1.7.4
 #pypcap>=1.1.5
-pyOpenSSL>=0.13
-PyYAML>=3.10
-requests
-scapy>=2.3.2
-service-identity
-simplejson>=3.8.1
-jsonschema>=2.6.0
-six>=1.10.0
-structlog>=16.1.0
-termcolor>=1.1.0
-treq>=15.1.0
-Twisted>=13.2.0
-urllib3>=1.7.1
-pyang>=1.7
+pyOpenSSL==17.3.0
+PyYAML==3.12
+requests==2.18.4
+scapy==2.3.3
+service-identity==17.0.0
+simplejson==3.12.0
+jsonschema==2.6.0
+six==1.11.0
+structlog==17.2.0
+termcolor==1.1.0
+treq==17.8.0
+Twisted==17.9.0
+urllib3==1.22
+pyang==1.7.3
 lxml==3.6.4
 nosexcover==1.0.11
-zmq>=0.0.0
-pyzmq>=16.0.2
+zmq==0.0.0
+pyzmq==16.0.3
 txZMQ==0.8.0
 ncclient==0.5.3
 xmltodict==0.11.0
-dicttoxml
+dicttoxml==1.7.4
 
 # python-consul>=0.6.1  we need the pre-released version for now, because 0.6.1 does not
 # yet support Twisted. Once this is released, it will be the 0.6.2 version