diff --git a/src/solver/consts.h b/src/solver/consts.h
index e5d851b14..764289f6e 100644
--- a/src/solver/consts.h
+++ b/src/solver/consts.h
@@ -3,7 +3,7 @@
 //
 //   Project: EPA SWMM5
 //   Version: 5.2
-//   Date:    02/12/23  (Build 5.2.3)
+//   Date:    07/15/23  (Build 5.2.4)
 //   Author:  L. Rossman
 //
 //   Various Constants
@@ -16,7 +16,7 @@
 // General Constants
 //------------------
 
-#define   VERSION            52003 
+#define   VERSION            52004 
 #define   MAGICNUMBER        516114522
 #define   EOFMARK            0x1A           // Use 0x04 for UNIX systems
 #define   MAXTITLE           3              // Max. # title lines
diff --git a/src/solver/inlet.c b/src/solver/inlet.c
index d7232d717..a51d8078b 100644
--- a/src/solver/inlet.c
+++ b/src/solver/inlet.c
@@ -1479,7 +1479,7 @@ double getCurbInletCapture(double Q, double L)
 //  Input:   Q = flow rate seen by inlet (cfs)
 //           L = length of inlet opening (ft)
 //  Output:  returns captured flow rate (cfs)
-//  Purpose: finds the flow captured by an on-sag inlet.
+//  Purpose: finds the flow captured by an on-grade curb opening inlet.
 //
 {
     double Se = Sx,     // equivalent gutter slope
diff --git a/src/solver/project.c b/src/solver/project.c
index a5a20dbd8..266fef914 100644
--- a/src/solver/project.c
+++ b/src/solver/project.c
@@ -3,7 +3,7 @@
 //
 //   Project:  EPA SWMM5
 //   Version:  5.2
-//   Date:     11/21/22  (Build 5.2.2)
+//   Date:     07/17/23  (Build 5.2.4)
 //   Author:   L. Rossman
 //
 //   Project management functions.
@@ -52,6 +52,10 @@
 //   Build 5.2.2:
 //   - Default number of threads changed from OMP max. number to 1
 //     to be consistent with User Manual.
+//   Build 5.2.4:
+//   - Default Inertial Damping changed from SOME to PARTIAL_DAMPING.
+//   - Default CourantFactor changed from 0 (fixed routing time step)
+//   - to 0.75 (variable time step)
 //-----------------------------------------------------------------------------
 #define _CRT_SECURE_NO_DEPRECATE
 
@@ -842,12 +846,12 @@ void setDefaults()
    SurchargeMethod = EXTRAN;           // Use EXTRAN method for surcharging
    CrownCutoff     = 0.96;             // Fractional pipe crown cutoff 
    AllowPonding    = FALSE;            // No ponding at nodes
-   InertDamping    = SOME;             // Partial inertial damping
+   InertDamping    = PARTIAL_DAMPING;  // Partial inertial damping
    NormalFlowLtd   = BOTH;             // Default normal flow limitation
    ForceMainEqn    = H_W;              // Hazen-Williams eqn. for force mains
    LinkOffsets     = DEPTH_OFFSET;     // Use depth for link offsets
    LengtheningStep = 0;                // No lengthening of conduits
-   CourantFactor   = 0.0;              // No variable time step 
+   CourantFactor   = 0.75;             // Variable time step reduced to 75%
    MinSurfArea     = 0.0;              // Force use of default min. surface area
    MinSlope        = 0.0;              // No user supplied minimum conduit slope
    SkipSteadyState = FALSE;            // Do flow routing in steady state periods 
diff --git a/src/solver/text.h b/src/solver/text.h
index 353296b8e..4bb46f059 100644
--- a/src/solver/text.h
+++ b/src/solver/text.h
@@ -3,7 +3,7 @@
 //
 //   Project: EPA SWMM5
 //   Version: 5.2
-//   Date:    12/22/22  (Build 5.2.3)
+//   Date:    07/15/23  (Build 5.2.4)
 //   Author:  L. Rossman
 //
 //   Text strings
@@ -25,7 +25,7 @@
 #define FMT03 " There are errors.\n"
 #define FMT04 " There are warnings.\n"
 #define FMT08 \
-  "\n  EPA STORM WATER MANAGEMENT MODEL - VERSION 5.2 (Build 5.2.3)"
+  "\n  EPA STORM WATER MANAGEMENT MODEL - VERSION 5.2 (Build 5.2.4)"
 #define FMT09 \
   "\n  ------------------------------------------------------------"
 #define FMT10 "\n"