diff --git a/teqp/fluiddata/dev/fluids/Cyclopentane.json b/teqp/fluiddata/dev/fluids/Cyclopentane.json
index 5a12d17d..cccae6ae 100644
--- a/teqp/fluiddata/dev/fluids/Cyclopentane.json
+++ b/teqp/fluiddata/dev/fluids/Cyclopentane.json
@@ -200,9 +200,9 @@
           "T_units": "K",
           "hmolar": 38057.35612816187,
           "hmolar_units": "J/mol",
-          "p": 4571200,
+          "p": 4582800,
           "p_units": "Pa",
-          "rhomolar": 3820.000000000001,
+          "rhomolar": 3920.000000000001,
           "rhomolar_units": "mol/m^3",
           "smolar": 87.99746047649523,
           "smolar_units": "J/mol/K"
@@ -240,26 +240,26 @@
       "acentric_units": "-",
       "alpha0": [
         {
-          "a1": 3.2489131288,
-          "a2": 2.6444166315,
+          "a1": -0.3946233253,
+          "a2": 2.4918910143,
           "type": "IdealGasHelmholtzLead"
         },
         {
-          "a": 0.96,
+          "a": 3.0,
           "type": "IdealGasHelmholtzLogTau"
         },
         {
           "n": [
-            3.34,
-            18.6,
-            13.9,
-            4.86
+            1.34,
+            13.4,
+            17.4,
+            6.65
           ],
           "t": [
-            0.2345032439615415,
-            2.540451809583366,
-            5.276322989134683,
-            10.35722660830141
+            0.4494645509262878,
+            2.3059485656218244,
+            4.299226139294927,
+            10.161807238333463
           ],
           "type": "IdealGasHelmholtzPlanckEinstein"
         }
@@ -291,73 +291,79 @@
             1
           ],
           "n": [
-            0.0536938,
-            1.60394,
-            -2.41244,
-            -0.474009,
-            0.203482,
-            -0.965616,
-            -0.344543,
-            0.353975,
-            -0.231373,
-            -0.0379099
+            0.0630928,
+            1.50365,
+            -2.37099,
+            -0.484886,
+            0.191843,
+            -0.835582,
+            -0.435929,
+            0.545607,
+            -0.209741,
+            -0.0387635
           ],
           "t": [
-            1,
+            1.0,
             0.29,
-            0.8,
-            1.14,
-            0.5,
-            2,
+            0.85,
+            1.185,
+            0.45,
+            2.28,
+            1.8,
             1.5,
-            1,
-            3.36,
-            0.95
-          ],
+            2.9,
+            0.93],
           "type": "ResidualHelmholtzPower"
         },
         {
           "beta": [
-            1.15,
-            1.61,
-            0.66,
-            2.72
+            0.63,
+            2.8,
+            0.5,
+            0.95,
+            0.23
           ],
           "d": [
             1,
             1,
             3,
-            3
+            3,
+            2
           ],
           "epsilon": [
-            0.68,
-            0.97,
-            0.84,
-            0.66
+            0.684,
+            0.7,
+            0.77,
+            0.625,
+            0.42
           ],
           "eta": [
-            0.82,
-            1.19,
-            0.79,
-            1.52
+            0.86,
+            0.85,
+            0.86,
+            1.53,
+            5.13
           ],
           "gamma": [
-            1.08,
-            0.36,
-            0.09,
-            1.48
+            1.22,
+            0.32,
+            0.22,
+            1.94,
+            1.21
           ],
           "n": [
-            0.867586,
-            -0.381827,
-            -0.108741,
-            -0.0976984
+            0.677674,
+            -0.137043,
+            -0.0852862,
+            -0.128085,
+            -0.00389381
           ],
           "t": [
-            1,
-            2.5,
-            2.5,
-            1.5
+            1.05,
+            4.0,
+            2.33,
+            1.5,
+            1.0
           ],
           "type": "ResidualHelmholtzGaussian"
         }
@@ -426,7 +432,7 @@
       "hmolar_units": "J/mol",
       "p": 4571200.0,
       "p_units": "Pa",
-      "rhomolar": 3820.000000000001,
+      "rhomolar": 3920.000000000001,
       "rhomolar_units": "mol/m^3",
       "smolar": 87.98268208465164,
       "smolar_units": "J/mol/K"
@@ -557,4 +563,4 @@
       "type": "Chung"
     }
   }
-}
\ No newline at end of file
+}