diff --git a/code/__DEFINES/rust_g.dm b/code/__DEFINES/rust_g.dm
index 76e5fa22d47486..5404cebed97e81 100644
--- a/code/__DEFINES/rust_g.dm
+++ b/code/__DEFINES/rust_g.dm
@@ -118,7 +118,7 @@
 #define rustg_dmi_icon_states(fname) RUSTG_CALL(RUST_G, "dmi_icon_states")(fname)
 
 #define rustg_file_read(fname) RUSTG_CALL(RUST_G, "file_read")(fname)
-#define rustg_file_exists(fname) RUSTG_CALL(RUST_G, "file_exists")(fname)
+#define rustg_file_exists(fname) (RUSTG_CALL(RUST_G, "file_exists")(fname) == "true")
 #define rustg_file_write(text, fname) RUSTG_CALL(RUST_G, "file_write")(text, fname)
 #define rustg_file_append(text, fname) RUSTG_CALL(RUST_G, "file_append")(text, fname)
 #define rustg_file_get_line_count(fname) text2num(RUSTG_CALL(RUST_G, "file_get_line_count")(fname))
@@ -129,7 +129,13 @@
 	#define text2file(text, fname) rustg_file_append(text, "[fname]")
 #endif
 
+/// Returns the git hash of the given revision, ex. "HEAD".
 #define rustg_git_revparse(rev) RUSTG_CALL(RUST_G, "rg_git_revparse")(rev)
+
+/**
+ * Returns the date of the given revision in the format YYYY-MM-DD.
+ * Returns null if the revision is invalid.
+ */
 #define rustg_git_commit_date(rev) RUSTG_CALL(RUST_G, "rg_git_commit_date")(rev)
 
 #define RUSTG_HTTP_METHOD_GET "get"
diff --git a/dependencies.sh b/dependencies.sh
index b0d457a9424d06..0445299077f254 100644
--- a/dependencies.sh
+++ b/dependencies.sh
@@ -8,7 +8,7 @@ export BYOND_MAJOR=515
 export BYOND_MINOR=1626
 
 #rust_g git tag
-export RUST_G_VERSION=3.0.0
+export RUST_G_VERSION=3.1.0
 
 #node version
 export NODE_VERSION=14
diff --git a/rust_g.dll b/rust_g.dll
index cfb52ffc65a03e..30f63e72f4b1d5 100644
Binary files a/rust_g.dll and b/rust_g.dll differ