diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index d9256cd8e2c..da60731108b 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -24,4 +24,4 @@ Describe what you expect the output to be. Knowing the correct behavior is also
 Provide any additional information here.
 
 #### Current Version:
-v2.23.0
+v2.24.0
diff --git a/RELEASE-NOTES.txt b/RELEASE-NOTES.txt
index 0860e729272..b307dc86254 100644
--- a/RELEASE-NOTES.txt
+++ b/RELEASE-NOTES.txt
@@ -5,6 +5,14 @@ Note: these are the release notes for the stan-dev/stan repository.
 Further changes may arise at the interface level (stan-dev/{rstan,
 pystan, cmdstan}) and math library level (stan-dev/math).
 
+v.2.24.0 (28 July 2020)
+======================================================================
+
+- `std::chrono` is now used for all timing purposes
+- fixed a bug with generated quantities for vectors of length 1
+- added `recover_memory` for normal exit of `log_prob_grad`
+- replaced the use of `boost::` functions/metaprograms in favor of `std::` where applicable
+
 v.2.23.0 (22 April 2020)
 ======================================================================
 
diff --git a/src/doxygen/doxygen.cfg b/src/doxygen/doxygen.cfg
index 3b56252d4dc..53bf7e301c3 100644
--- a/src/doxygen/doxygen.cfg
+++ b/src/doxygen/doxygen.cfg
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Stan"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 2.23.0
+PROJECT_NUMBER         = 2.24.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/src/stan/version.hpp b/src/stan/version.hpp
index f9907db36f5..0a8192f396c 100644
--- a/src/stan/version.hpp
+++ b/src/stan/version.hpp
@@ -12,7 +12,7 @@
 #endif
 
 #define STAN_MAJOR 2
-#define STAN_MINOR 23
+#define STAN_MINOR 24
 #define STAN_PATCH 0
 
 namespace stan {
diff --git a/src/test/unit/version_test.cpp b/src/test/unit/version_test.cpp
index ef0801fb9e1..eba692aa0d6 100644
--- a/src/test/unit/version_test.cpp
+++ b/src/test/unit/version_test.cpp
@@ -3,12 +3,12 @@
 
 TEST(Stan, macro) {
   EXPECT_EQ(2, STAN_MAJOR);
-  EXPECT_EQ(23, STAN_MINOR);
+  EXPECT_EQ(24, STAN_MINOR);
   EXPECT_EQ(0, STAN_PATCH);
 }
 
 TEST(Stan, version) {
   EXPECT_EQ("2", stan::MAJOR_VERSION);
-  EXPECT_EQ("23", stan::MINOR_VERSION);
+  EXPECT_EQ("24", stan::MINOR_VERSION);
   EXPECT_EQ("0", stan::PATCH_VERSION);
 }