diff --git a/sailreval/__init__.py b/sailreval/__init__.py
index 052e87e..2634dd8 100755
--- a/sailreval/__init__.py
+++ b/sailreval/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "1.4.2"
+__version__ = "1.5.0"
 
 # create loggers
 import logging
diff --git a/sailreval/analysis/counting.py b/sailreval/analysis/counting.py
index 19e5d13..c7a9afc 100644
--- a/sailreval/analysis/counting.py
+++ b/sailreval/analysis/counting.py
@@ -13,7 +13,6 @@
 from sailreval.utils import load_tomls_by_bin_name, bcolors
 from sailreval.utils.sailr_target import SAILRTarget
 from sailreval.utils.compile import DEFAULT_OPTIMIZATION_LEVELS, OPTIMIZATION_LEVELS
-from pyjoern import JoernServer, JoernClient
 
 from tqdm import tqdm
 import toml
@@ -793,6 +792,7 @@ def _format_number(num):
 def _find_functions_with_switches(source_path: Path, port):
     source_name = source_path.name.split(".c")[0]
 
+    from pyjoern import JoernServer, JoernClient
     with JoernServer(port=port):
         client = JoernClient(source_path, port=port)
         functions = client.functions_with_switches()
diff --git a/sailreval/analysis/measure.py b/sailreval/analysis/measure.py
index 28fe995..c8ce1fb 100644
--- a/sailreval/analysis/measure.py
+++ b/sailreval/analysis/measure.py
@@ -10,8 +10,6 @@
 from typing import List
 
 import toml
-from pyjoern import JoernClient, JoernServer, fast_cfgs_from_source
-from pyjoern.mapping import cfg_root_node, correct_source_cfg_addrs
 
 from sailreval import ALL_DECOMPILERS, ALL_METRICS, SAILR_DECOMPILERS, SAILR_METRICS, JOERNLESS_SERVER_METRICS
 from sailreval.metrics import get_metric_function, POST_METRICS
@@ -33,6 +31,7 @@ def measure(filepath: Path, basename: str, metrics, functions, joern_port=9000,
     if not require_joern:
         client = None
     else:
+        from pyjoern import JoernClient
         if client is None:
             client = JoernClient(filepath, port=joern_port, bin_name=basename)
     
@@ -91,6 +90,7 @@ def _measure_files_with_joern_server():
             l.debug(f"JOERN server not needed for {basename}")
             measure_files(file_dir, basename, decompilers=decompilers, metrics=metrics, functions=functions, cores=cores, joern_port=joern_port, require_joern=False, cache_dir=cache_dir)
         else:
+            from pyjoern import JoernServer
             try:
                 with JoernServer(port=joern_port):
                     measure_files(file_dir, basename, decompilers=decompilers, metrics=metrics, functions=functions, cores=cores, joern_port=joern_port, cache_dir=cache_dir)
@@ -183,6 +183,9 @@ def measure_files(file_dir: Path, basename: str, decompilers=None, metrics=None,
             SAILR_METRICS.CODE_COMPLEXITY, SAILR_METRICS.GED_EXACT
         )
     )
+    if require_cfgs:
+        from pyjoern import fast_cfgs_from_source
+        from pyjoern.mapping import correct_source_cfg_addrs
 
     # collect the source CFGs first if they are needed
     source_cfgs, dec_cfgs = {}, {}
diff --git a/sailreval/analysis/visualization.py b/sailreval/analysis/visualization.py
index 0bafc49..16f1749 100644
--- a/sailreval/analysis/visualization.py
+++ b/sailreval/analysis/visualization.py
@@ -1,22 +1,16 @@
-from pathlib import Path
 import textwrap
 from typing import Dict, List
-import matplotlib as mpl
-mpl.use('Agg')
-import matplotlib.pyplot as plt
-import numpy as np
-import pandas as pd
-#import seaborn as sns
 
 STAT_TYPES = ("sum", "mean", "median")
 
 
-
 #
 # Graphs
 #
 
 def plot_histogram(data1, data2, save_path="./histo_chart.png"):
+    import matplotlib as mpl
+    mpl.use('Agg')
     import matplotlib.pyplot as plt
     import numpy as np
     
@@ -58,6 +52,11 @@ def plot_histogram(data1, data2, save_path="./histo_chart.png"):
 
 
 def plot_diff_barchar(data_by_row: Dict[str, List], metric: str, decompilers: List, save_path="./diff_bar_chart.png"):
+    import matplotlib as mpl
+    mpl.use('Agg')
+    import matplotlib.pyplot as plt
+    import pandas as pd
+
     assert len(decompilers) == 2
     metric_data = data_by_row[metric]
 
@@ -79,6 +78,10 @@ def plot_diff_barchar(data_by_row: Dict[str, List], metric: str, decompilers: Li
 
 
 def plot_barchart(data_by_row: Dict[str, List], save_path="./bar_chart.png"):
+    import matplotlib as mpl
+    mpl.use('Agg')
+    import matplotlib.pyplot as plt
+    import pandas as pd
     data = {
         'Function': range(len(data_by_row["angr_sailr"])),
         'angr_phoenix': data_by_row["angr_phoenix"],
@@ -104,6 +107,9 @@ def plot_barchart(data_by_row: Dict[str, List], save_path="./bar_chart.png"):
 
 
 def plot_box_plot(data_by_row: Dict[str, List], save_path="./boxplot.png"):
+    import matplotlib as mpl
+    mpl.use('Agg')
+    import matplotlib.pyplot as plt
     plt.figure(figsize=(10, 6))  # Set the figure size
     plt.boxplot(data_by_row.values(), vert=False, widths=0.7)  # Plot the data
 
diff --git a/sailreval/metrics/ged_to_source.py b/sailreval/metrics/ged_to_source.py
index b18446f..ff12393 100644
--- a/sailreval/metrics/ged_to_source.py
+++ b/sailreval/metrics/ged_to_source.py
@@ -2,7 +2,6 @@
 from pathlib import Path
 from typing import Dict
 
-from pyjoern.mapping import correct_decompiler_mappings, read_line_maps
 from cfgutils.similarity import ged_max, ged_upperbound, ged_exact
 from cfgutils.similarity import cfg_edit_distance as _cfg_edit_distance
 import networkx as nx
@@ -81,6 +80,7 @@ def cfg_edit_distance(
 
 
 def compute_cfg_edit_distance(dec_cfg, src_cfg, function, binary_path: Path, decompiler: str):
+    from pyjoern.mapping import correct_decompiler_mappings, read_line_maps
     binary_path = Path(binary_path)
     bin_dir = binary_path.parent
     bin_name = binary_path.with_suffix("").name
diff --git a/sailreval/utils/compile.py b/sailreval/utils/compile.py
index e4b98f6..b298c70 100644
--- a/sailreval/utils/compile.py
+++ b/sailreval/utils/compile.py
@@ -11,7 +11,6 @@
 
 import toml
 from tqdm import tqdm
-from pyjoern import JoernClient, JoernServer
 
 from .sailr_target import SAILRTarget
 from ..utils import timeout
@@ -148,6 +147,8 @@ def _collect_function_lines(
     cachable_results = {}
     basename = i_file.with_suffix("").with_suffix("").name
 
+    from pyjoern import JoernClient, JoernServer
+
     def _eval_with_server(joern_port, src_file, i_file):
         with JoernServer(port=joern_port):
             src_client = JoernClient(src_file, port=joern_port)
diff --git a/setup.cfg b/setup.cfg
index 5739fa5..642de2c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,7 +5,7 @@ url = https://github.com/mahaloz/sailr-eval
 classifiers =
     License :: OSI Approved :: BSD License
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.8
 license = BSD 2 Clause
 license_files = LICENSE
 description = The SAILR Evaluation Pipeline
@@ -15,21 +15,19 @@ long_description_content_type = text/markdown
 [options]
 install_requires =
     networkx
-    graphviz
-    pygraphviz
     toml
-    psutil
     tqdm
-    docker
-    matplotlib
-    numpy
-    pandas
-    scipy
-    seaborn
     pyelftools
     cfgutils>=1.8.1
     pyjoern==1.2.18.6
-
-python_requires = >= 3.6
+python_requires = >= 3.8
 packages = find:
 include_package_data = True
+
+[options.extras_require]
+viz =
+    matplotlib
+    numpy
+    pandas
+    seaborn
+