diff --git a/spras/rwr.py b/spras/rwr.py
index e7691f160..49bc89ba3 100644
--- a/spras/rwr.py
+++ b/spras/rwr.py
@@ -35,7 +35,7 @@ def generate_inputs(data, filename_map):
         edges = data.get_interactome()
         edges = convert_undirected_to_directed(edges)
 
-        edges.to_csv(filename_map['network'],sep='|',index=False,columns=['Interactor1','Interactor2'],header=False)
+        edges.to_csv(filename_map['network'],sep='|',index=False,columns=['Interactor1', 'Interactor2', 'Weight'],header=False)
 
     @staticmethod
     def run(network=None, nodes=None, alpha=None, output_file=None, container_settings=None, threshold=None):
@@ -47,8 +47,8 @@ def run(network=None, nodes=None, alpha=None, output_file=None, container_settin
             for line in network_f:
                 line = line.strip()
                 endpoints = line.split("|")
-                if len(endpoints) != 2:
-                    raise ValueError(f"Edge {line} does not contain 2 nodes separated by '|'")
+                if len(endpoints) != 3:
+                    raise ValueError(f"Edge {line} does not contain 2 nodes and 1 weight separated by '|'")
         work_dir = '/spras'
 
         # Each volume is a tuple (src, dest)
diff --git a/spras/strwr.py b/spras/strwr.py
index c99b39830..b44af5cee 100644
--- a/spras/strwr.py
+++ b/spras/strwr.py
@@ -35,7 +35,7 @@ def generate_inputs(data, filename_map):
         edges = data.get_interactome()
         edges = convert_undirected_to_directed(edges)
 
-        edges.to_csv(filename_map['network'],sep='|',index=False,columns=['Interactor1','Interactor2'],header=False)
+        edges.to_csv(filename_map['network'],sep='|',index=False,columns=['Interactor1', 'Interactor2', 'Weight'],header=False)
 
     @staticmethod
     def run(network=None, sources=None, targets=None, alpha=None, output_file=None, container_settings=None, threshold=None):
@@ -47,8 +47,8 @@ def run(network=None, sources=None, targets=None, alpha=None, output_file=None,
             for line in network_f:
                 line = line.strip()
                 endpoints = line.split("|")
-                if len(endpoints) != 2:
-                    raise ValueError(f"Edge {line} does not contain 2 nodes separated by '|'")
+                if len(endpoints) != 3:
+                    raise ValueError(f"Edge {line} does not contain 2 nodes and 1 weight separated by '|'")
 
         work_dir = '/spras'
 
diff --git a/test/RWR/input/rwr-bad-network.txt b/test/RWR/input/rwr-bad-network.txt
index 8f774c46c..f54d26a17 100644
--- a/test/RWR/input/rwr-bad-network.txt
+++ b/test/RWR/input/rwr-bad-network.txt
@@ -1,5 +1,5 @@
-A|B|F
-A|C
-B|D
-C|B
-C|E
+A|B|1|F
+A|C|1
+B|D|1
+C|B|1
+C|E|1
diff --git a/test/RWR/input/rwr-network.txt b/test/RWR/input/rwr-network.txt
index 4b33b37d4..1449f6afe 100644
--- a/test/RWR/input/rwr-network.txt
+++ b/test/RWR/input/rwr-network.txt
@@ -1,5 +1,5 @@
-A|B
-A|C
-B|D
-C|B
-C|E
+A|B|1
+A|C|1
+B|D|1
+C|B|1
+C|E|1
diff --git a/test/ST_RWR/input/strwr-bad-network.txt b/test/ST_RWR/input/strwr-bad-network.txt
index 8f774c46c..f54d26a17 100644
--- a/test/ST_RWR/input/strwr-bad-network.txt
+++ b/test/ST_RWR/input/strwr-bad-network.txt
@@ -1,5 +1,5 @@
-A|B|F
-A|C
-B|D
-C|B
-C|E
+A|B|1|F
+A|C|1
+B|D|1
+C|B|1
+C|E|1
diff --git a/test/ST_RWR/input/strwr-network.txt b/test/ST_RWR/input/strwr-network.txt
index 4b33b37d4..1449f6afe 100644
--- a/test/ST_RWR/input/strwr-network.txt
+++ b/test/ST_RWR/input/strwr-network.txt
@@ -1,5 +1,5 @@
-A|B
-A|C
-B|D
-C|B
-C|E
+A|B|1
+A|C|1
+B|D|1
+C|B|1
+C|E|1
diff --git a/test/generate-inputs/expected/rwr-network-expected.txt b/test/generate-inputs/expected/rwr-network-expected.txt
index 721390f8c..fe622dde5 100644
--- a/test/generate-inputs/expected/rwr-network-expected.txt
+++ b/test/generate-inputs/expected/rwr-network-expected.txt
@@ -1,4 +1,4 @@
-test_A|B
-B|C
-B|test_A
-C|B
+test_A|B|0.98
+B|C|0.77
+B|test_A|0.98
+C|B|0.77
diff --git a/test/generate-inputs/expected/strwr-network-expected.txt b/test/generate-inputs/expected/strwr-network-expected.txt
index 721390f8c..fe622dde5 100644
--- a/test/generate-inputs/expected/strwr-network-expected.txt
+++ b/test/generate-inputs/expected/strwr-network-expected.txt
@@ -1,4 +1,4 @@
-test_A|B
-B|C
-B|test_A
-C|B
+test_A|B|0.98
+B|C|0.77
+B|test_A|0.98
+C|B|0.77