diff --git a/src/propeller/problems/regression/UBall5D.cljc b/src/propeller/problems/regression/UBall5D.cljc
index 97846eb..e063bdf 100644
--- a/src/propeller/problems/regression/UBall5D.cljc
+++ b/src/propeller/problems/regression/UBall5D.cljc
@@ -115,7 +115,7 @@
        :training-data            (:train train-and-test-data)
        :testing-data             (:test train-and-test-data)
        :max-generations          300
-       :population-size          1000
+       :population-size          20
        :max-initial-plushy-size  100
        :step-limit               200
        :parent-selection         :lexicase
diff --git a/src/propeller/session.cljc b/src/propeller/session.cljc
index 2149269..c9a7e89 100755
--- a/src/propeller/session.cljc
+++ b/src/propeller/session.cljc
@@ -18,6 +18,7 @@
             [propeller.push.interpreter :as interpreter]
             [propeller.push.state :as state]
             [propeller.problems.regression.integer-regression :as regression]
+            [propeller.problems.string-classification :as sc]
             [propeller.downsample :as downsample]
             ))
 
@@ -99,7 +100,7 @@
         :population-size         50
         :max-initial-plushy-size 100
         :step-limit              200
-        :parent-selection        :tournament
+        :parent-selection        :lexicase
         :tournament-size         5
         :umad-rate               0.01
         :variation               {:umad      1.0
@@ -113,7 +114,7 @@
           :training-data           (:train sc/train-and-test-data)
           :testing-data            (:test sc/train-and-test-data)
           :max-generations         500
-          :population-size         500
+          :population-size         15
           :max-initial-plushy-size 100
           :step-limit              200
           :parent-selection        :lexicase