diff --git a/sumy/summarizers/lex_rank.py b/sumy/summarizers/lex_rank.py
index c6d230a..85f0bf2 100644
--- a/sumy/summarizers/lex_rank.py
+++ b/sumy/summarizers/lex_rank.py
@@ -164,6 +164,7 @@ def power_method(matrix, epsilon):
 
         while lambda_val > epsilon:
             next_p = numpy.dot(transposed_matrix, p_vector)
+            next_p /= numpy.linalg.norm(next_p)
             lambda_val = numpy.linalg.norm(numpy.subtract(next_p, p_vector))
             p_vector = next_p
 
diff --git a/tests/test_summarizers/test_lex_rank.py b/tests/test_summarizers/test_lex_rank.py
index 85f9999..1e9c057 100644
--- a/tests/test_summarizers/test_lex_rank.py
+++ b/tests/test_summarizers/test_lex_rank.py
@@ -169,3 +169,16 @@ def test_power_method_should_return_different_scores_for_sentences():
     scores = LexRankSummarizer.power_method(matrix, LexRankSummarizer.epsilon)
 
     assert len(frozenset(scores.tolist())) > 1
+
+def test_power_method_should_return_finite():
+    """See https://github.com/miso-belica/sumy/issues/187"""
+    matrix = numpy.array([
+        [0.1, 0.2, 0.3, 0.6, 0.9],
+        [0.45, 0, 0.3, 0.6, 0],
+        [0.5, 0.6, 0.3, 1, 0.9],
+        [0.7, 0, 0, 0.6, 0],
+        [0.5, 0.123, 0, 0.111, 0.9],
+    ])
+    scores = LexRankSummarizer.power_method(matrix, LexRankSummarizer.epsilon)
+
+    assert all(numpy.isfinite(scores))
\ No newline at end of file